TI: armv7: Do not define the number DRAM banks if is already defined.

If CONFIG_NR_DRAM_BANKS is not defined, we say (for simplicity) that we have
1 bank, but for some boards should be interesting that we can define
CONFIG_NR_DRAM_BANKS. To handle this possibility just define the number of
DRAM banks if is not already defined. This is useful for some OMAP3 boards
where the DRAM initialitzation is only at u-boot level.

Signed-off-by: Enric Balletbo i Serra <eballetbo@gmail.com>

include/configs/ti_armv7_common.h

@@ -45,11 +45,15 @@
 #define CONFIG_BOOTDELAY		1
 
 /*
- * DDR information.  We say (for simplicity) that we have 1 bank,
- * always, even when we have more.  We always start at 0x80000000,
- * and we place the initial stack pointer in our SRAM.
+ * DDR information.  If the CONFIG_NR_DRAM_BANKS is not defined,
+ * we say (for simplicity) that we have 1 bank, always, even when
+ * we have more.  We always start at 0x80000000, and we place the
+ * initial stack pointer in our SRAM. Otherwise, we can define
+ * CONFIG_NR_DRAM_BANKS before including this file.
  */
+#ifndef CONFIG_NR_DRAM_BANKS
 #define CONFIG_NR_DRAM_BANKS		1
+#endif
 #define CONFIG_SYS_SDRAM_BASE		0x80000000
 #define CONFIG_SYS_INIT_SP_ADDR         (NON_SECURE_SRAM_END - \
 						GENERATED_GBL_DATA_SIZE)