OMAP3: drop CONFIG_SPL_OS_BOOT_KEY and use local define

CONFIG_SPL_OS_BOOT_KEY is used only in board files. It is
not required to have a general CONFIG_ option. Rename it and
define it in board directory.

Signed-off-by: Stefano Babic <sbabic@denx.de>
Reviewed-by: Tom Rini <trini@ti.com>

board/technexion/twister/twister.c

@@ -165,10 +165,10 @@ void spl_board_prepare_for_linux(void)
 int spl_start_uboot(void)
 {
 	int val = 0;
-	if (!gpio_request(CONFIG_SPL_OS_BOOT_KEY, "U-Boot key")) {
-		gpio_direction_input(CONFIG_SPL_OS_BOOT_KEY);
-		val = gpio_get_value(CONFIG_SPL_OS_BOOT_KEY);
-		gpio_free(CONFIG_SPL_OS_BOOT_KEY);
+	if (!gpio_request(SPL_OS_BOOT_KEY, "U-Boot key")) {
+		gpio_direction_input(SPL_OS_BOOT_KEY);
+		val = gpio_get_value(SPL_OS_BOOT_KEY);
+		gpio_free(SPL_OS_BOOT_KEY);
 	}
 	return val;
 }

board/technexion/twister/twister.h

@@ -38,6 +38,8 @@ const omap3_sysinfo sysinfo = {
 #define XR16L2751_UART1_BASE	0x21000000
 #define XR16L2751_UART2_BASE	0x23000000
 
+/* GPIO used to select between U-Boot and kernel */
+#define SPL_OS_BOOT_KEY	55
 
 /*
  * IEN  - Input Enable

board/timll/devkit8000/devkit8000.c

@@ -172,10 +172,10 @@ void spl_board_prepare_for_linux(void)
 int spl_start_uboot(void)
 {
 	int val = 0;
-	if (!gpio_request(CONFIG_SPL_OS_BOOT_KEY, "U-Boot key")) {
-		gpio_direction_input(CONFIG_SPL_OS_BOOT_KEY);
-		val = gpio_get_value(CONFIG_SPL_OS_BOOT_KEY);
-		gpio_free(CONFIG_SPL_OS_BOOT_KEY);
+	if (!gpio_request(SPL_OS_BOOT_KEY, "U-Boot key")) {
+		gpio_direction_input(SPL_OS_BOOT_KEY);
+		val = gpio_get_value(SPL_OS_BOOT_KEY);
+		gpio_free(SPL_OS_BOOT_KEY);
 	}
 	return !val;
 }

board/timll/devkit8000/devkit8000.h

@@ -32,6 +32,9 @@ const omap3_sysinfo sysinfo = {
 	"NAND",
 };
 
+/* GPIO used to select between U-Boot and kernel */
+#define SPL_OS_BOOT_KEY	26
+
 /*
  * IEN  - Input Enable
  * IDIS - Input Disable

include/configs/devkit8000.h

@@ -354,7 +354,6 @@
 
 /* SPL OS boot options */
 #define CONFIG_SPL_OS_BOOT
-#define CONFIG_SPL_OS_BOOT_KEY	26
 
 #define CONFIG_CMD_SPL
 #define CONFIG_CMD_SPL_WRITE_SIZE       0x400 /* 1024 byte */

include/configs/twister.h

@@ -58,7 +58,6 @@
 #define CONFIG_CMD_SPL_NAND_OFS	(CONFIG_SYS_NAND_SPL_KERNEL_OFFS+\
 						0x600000)
 #define CONFIG_SPL_OS_BOOT
-#define CONFIG_SPL_OS_BOOT_KEY	55
 
 #define CONFIG_SYS_SPL_ARGS_ADDR	(PHYS_SDRAM_1 + 0x100)
 #define CONFIG_SPL_BOARD_INIT