ARM: DRA7: configs: Prepare for detecting memory > 2GB

Enable configs that are required for detecting memory > 2GB.
Reviewed-by: Tom Rini <trini@konsulko.com>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>

include/configs/dra7xx_evm.h

@@ -19,6 +19,11 @@
 #define CONFIG_IODELAY_RECALIBRATION
 #endif
 
+#define CONFIG_VERY_BIG_RAM
+#define CONFIG_PHYS_64BIT
+#define CONFIG_NR_DRAM_BANKS		2
+#define CONFIG_MAX_MEM_MAPPED		0x80000000
+
 #ifndef CONFIG_QSPI_BOOT
 /* MMC ENV related defines */
 #define CONFIG_ENV_IS_IN_MMC