powerpc/p1010rdb: SECURE BOOT enabled for NAND

In case of secure boot from NAND, the DDR is initialized by the
BootROM using the config words (CF_WORDS) in the CF_HEADER
and u-boot image is copied from NAND to DDR by the BootROM.
So, CONFIG_SYS_RAMBOOT has been defined for Secure Boot from NAND.
Signed-off-by: NAneesh Bansal <aneesh.bansal@freescale.com>
Reviewed-by: NYork Sun <yorksun@freescale.com>

include/configs/P1010RDB.h

@@ -541,7 +541,8 @@ extern unsigned long get_sdram_size(void);
 					FTIM2_GPCM_TWP(0x1f))
 #define CONFIG_SYS_CS3_FTIM3		0x0
 
-#if defined(CONFIG_RAMBOOT_SDCARD) || defined(CONFIG_RAMBOOT_SPIFLASH)
+#if defined(CONFIG_RAMBOOT_SDCARD) || defined(CONFIG_RAMBOOT_SPIFLASH) || \
+	defined(CONFIG_RAMBOOT_NAND)
 #define CONFIG_SYS_RAMBOOT
 #define CONFIG_SYS_EXTRA_ENV_RELOC
 #else