ARMV7: OMAP3: Cleanup extern variables in mem.c

Removed boot_flash_* extern variables.
boot_flash_type was totally unused. The other ones were actually constants, so
they have been replaced with #defines in the board config files.

Signed-off-by: Luca Ceresoli <luca.ceresoli@comelit.it>
Cc: Wolfgang Denk <wd@denx.de>
Cc: Albert Aribaud <albert.aribaud@free.fr>
Cc: Sandeep Paulraj <s-paulraj@ti.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
diff --git a/include/configs/am3517_evm.h b/include/configs/am3517_evm.h
index 70e8f07..f5d5821 100644
--- a/include/configs/am3517_evm.h
+++ b/include/configs/am3517_evm.h
@@ -294,7 +294,9 @@
 #define CONFIG_SYS_MAX_FLASH_BANKS	2	/* max number of flash banks */
 #define CONFIG_SYS_MONITOR_LEN		(256 << 10)	/* Reserve 2 sectors */
 
-#define CONFIG_SYS_FLASH_BASE		boot_flash_base
+#if defined(CONFIG_CMD_NAND)
+#define CONFIG_SYS_FLASH_BASE		PISMO1_NAND_BASE
+#endif
 
 /* Monitor at start of flash */
 #define CONFIG_SYS_MONITOR_BASE		CONFIG_SYS_FLASH_BASE
@@ -304,9 +306,9 @@
 #define CONFIG_ENV_IS_IN_NAND		1
 #define SMNAND_ENV_OFFSET		0x260000 /* environment starts here */
 
-#define CONFIG_SYS_ENV_SECT_SIZE	boot_flash_sec
-#define CONFIG_ENV_OFFSET		boot_flash_off
-#define CONFIG_ENV_ADDR			boot_flash_env_addr
+#define CONFIG_SYS_ENV_SECT_SIZE	(128 << 10)	/* 128 KiB */
+#define CONFIG_ENV_OFFSET		SMNAND_ENV_OFFSET
+#define CONFIG_ENV_ADDR			SMNAND_ENV_OFFSET
 
 /*-----------------------------------------------------------------------
  * CFI FLASH driver setup
@@ -323,14 +325,6 @@
 #define CONFIG_SYS_JFFS2_FIRST_BANK	CONFIG_SYS_MAX_FLASH_BANKS
 #define CONFIG_SYS_JFFS2_NUM_BANKS	1
 
-#ifndef __ASSEMBLY__
-extern unsigned int boot_flash_base;
-extern volatile unsigned int boot_flash_env_addr;
-extern unsigned int boot_flash_off;
-extern unsigned int boot_flash_sec;
-extern unsigned int boot_flash_type;
-#endif
-
 #define CONFIG_SYS_SDRAM_BASE		PHYS_SDRAM_1
 #define CONFIG_SYS_INIT_RAM_ADDR	0x4020f800
 #define CONFIG_SYS_INIT_RAM_SIZE	0x800