ARM: uniphier: change stack pointer address for SPL

No special reason for the current stack address 0x0ff08000.
Change it to 0x00100000 to simplify the init_page_table.

There are two types of SoCs in terms of the load address of SPL.

 [1] PH1-sLD3, PH1-LD4, PH1-sLD8
   SPL is loaded at 0x00040000-0x0004ffff
 [2] PH1-Pro4, PH1-Pro5, ProXstream2, PH1-LD6b
   SPL is loaded at 0x00100000-0x0010ffff

The new stack area (0x000f8000-0x00100000) should be safe for all the
cases.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

arch/arm/mach-uniphier/init_page_table.S

@@ -13,15 +13,12 @@
 #define DEVICE	0x00002002 /* Non-shareable Device */
 #define NORMAL	0x0000000e /* Normal Memory Write-Back, No Write-Allocate */
 
-#define TEXT_SECTION	((CONFIG_SPL_TEXT_BASE) >> (SECTION_SHIFT))
-#define STACK_SECTION	((CONFIG_SPL_STACK) >> (SECTION_SHIFT))
-
 	.section ".rodata"
 	.align 14
 ENTRY(init_page_table)
 	section = 0
 	.rept NR_SECTIONS
-	.if section == 0 || section == 1 || section == STACK_SECTION
+	.if section == 0 || section == 1
 	attr = NORMAL
 	.else
 	attr = DEVICE

include/configs/uniphier.h

@@ -252,7 +252,7 @@
 #define CONFIG_SPL_TEXT_BASE		0x00100000
 #endif
 
-#define CONFIG_SPL_STACK		(0x0ff08000)
+#define CONFIG_SPL_STACK		(0x00100000)
 #define CONFIG_SYS_INIT_SP_ADDR		(CONFIG_SYS_TEXT_BASE)
 
 #define CONFIG_PANIC_HANG