mpc8641: Drop imaginary second flash bank, map 8MB

There's a lot of setup and foo for the second flash
bank.  The problem is, this board doesn't actually have one.
Clean this up.  Also, the flash is 8M in size.  Get rid
of the confusing aliased overmapping, and just map 8M.

Signed-off-by: Becky Bruce <becky.bruce@freescale.com>

board/freescale/mpc8641hpcn/law.c

@@ -58,7 +58,7 @@ struct law_entry law_table[] = {
 	SET_LAW(CONFIG_SYS_RIO_MEM_PHYS, LAW_SIZE_512M, LAW_TRGT_IF_RIO),
 #endif
 	SET_LAW(PIXIS_BASE, LAW_SIZE_2M, LAW_TRGT_IF_LBC),
-	SET_LAW((CONFIG_SYS_FLASH_BASE & 0xfe000000), LAW_SIZE_32M, LAW_TRGT_IF_LBC),
+	SET_LAW(CONFIG_SYS_FLASH_BASE, LAW_SIZE_8M, LAW_TRGT_IF_LBC),
 };
 
 int num_law_entries = ARRAY_SIZE(law_table);

include/configs/MPC8641HPCN.h

@@ -159,31 +159,16 @@ extern unsigned long get_board_sys_clk(unsigned long dummy);
 #define CONFIG_SYS_I2C_EEPROM_ADDR     0x57
 #define CONFIG_SYS_I2C_EEPROM_ADDR_LEN 1
 
-/*
- * In MPC8641HPCN, allocate 16MB flash spaces at fe000000 and ff000000.
- * There is an 8MB flash.  In effect, the addresses from fe000000 to fe7fffff
- * map to fe800000 to ffffffff, and ff000000 to ff7fffff map to ffffffff.
- * However, when u-boot comes up, the flash_init needs hard start addresses
- * to build its info table.  For user convenience, the flash addresses is
- * fe800000 and ff800000.  That way, u-boot knows where the flash is
- * and the user can download u-boot code from promjet to fef00000, a
- * more intuitive location than fe700000.
- *
- * Note that, on switching the boot location, fef00000 becomes fff00000.
- */
-#define CONFIG_SYS_FLASH_BASE		0xfe800000     /* start of FLASH 32M */
-#define CONFIG_SYS_FLASH_BASE2		0xff800000
+#define CONFIG_SYS_FLASH_BASE		0xff800000     /* start of FLASH 8M */
 
-#define CONFIG_SYS_FLASH_BANKS_LIST {CONFIG_SYS_FLASH_BASE, CONFIG_SYS_FLASH_BASE2}
+#define CONFIG_SYS_FLASH_BANKS_LIST {CONFIG_SYS_FLASH_BASE}
 
 /* Convert an address into the right format for the BR registers */
 #define BR_PHYS_ADDR(x) (x & 0xffff8000)
 
-#define CONFIG_SYS_BR0_PRELIM		0xff001001	/* port size 16bit */
-#define CONFIG_SYS_OR0_PRELIM		0xff006ff7	/* 16MB Boot Flash area*/
-
-#define CONFIG_SYS_BR1_PRELIM		0xfe001001	/* port size 16bit */
-#define CONFIG_SYS_OR1_PRELIM		0xff006ff7	/* 16MB Alternate Boot Flash area*/
+#define CONFIG_SYS_BR0_PRELIM		(BR_PHYS_ADDR(CONFIG_SYS_FLASH_BASE) \
+					 | 0x00001001)	/* port size 16bit */
+#define CONFIG_SYS_OR0_PRELIM		0xff806ff7	/* 8MB Boot Flash area*/
 
 #define CONFIG_SYS_BR2_PRELIM		(BR_PHYS_ADDR(CF_BASE)		\
 					 | 0x00001001)	/* port size 16bit */
@@ -215,7 +200,7 @@ extern unsigned long get_board_sys_clk(unsigned long dummy);
 /* Compact flash shares a BAT with PIXIS; make sure they're contiguous */
 #define CF_BASE			(PIXIS_BASE + 0x00100000)
 
-#define CONFIG_SYS_MAX_FLASH_BANKS	2		/* number of banks */
+#define CONFIG_SYS_MAX_FLASH_BANKS	1		/* number of banks */
 #define CONFIG_SYS_MAX_FLASH_SECT	128		/* sectors per device */
 
 #undef	CONFIG_SYS_FLASH_CHECKSUM
@@ -501,13 +486,15 @@ extern unsigned long get_board_sys_clk(unsigned long dummy);
 #define CONFIG_SYS_IBAT5U	CONFIG_SYS_DBAT5U
 
 /*
- * BAT6		32M    Cache-inhibited, guarded
- * 0xfe00_0000	32M    FLASH
+ * BAT6		8M    Cache-inhibited, guarded
+ * 0xff80_0000	8M    FLASH
  */
-#define CONFIG_SYS_DBAT6L	((CONFIG_SYS_FLASH_BASE & 0xfe000000) | BATL_PP_RW \
-			| BATL_CACHEINHIBIT | BATL_GUARDEDSTORAGE)
-#define CONFIG_SYS_DBAT6U	((CONFIG_SYS_FLASH_BASE & 0xfe000000) | BATU_BL_32M | BATU_VS | BATU_VP)
-#define CONFIG_SYS_IBAT6L	((CONFIG_SYS_FLASH_BASE & 0xfe000000) | BATL_PP_RW | BATL_MEMCOHERENCE)
+#define CONFIG_SYS_DBAT6L	(CONFIG_SYS_FLASH_BASE | BATL_PP_RW \
+				 | BATL_CACHEINHIBIT | BATL_GUARDEDSTORAGE)
+#define CONFIG_SYS_DBAT6U	(CONFIG_SYS_FLASH_BASE | BATU_BL_8M | BATU_VS \
+				 | BATU_VP)
+#define CONFIG_SYS_IBAT6L	(CONFIG_SYS_FLASH_BASE | BATL_PP_RW \
+				 | BATL_MEMCOHERENCE)
 #define CONFIG_SYS_IBAT6U	CONFIG_SYS_DBAT6U
 
 #define CONFIG_SYS_DBAT7L 0x00000000