powerpc/corenet_ds: Various updates to initial env cfg

* Make the U-Boot update command sequence conditional.  Helps prevent
  accidental erasing if an upload or previous step fails
* Make it easier to update other FLASH banks
* Enable DDR controller cache line interleaving and bank cs0/cs1 by default

Signed-off-by: Emil Medve <Emilian.Medve@Freescale.com>
Signed-off-by: York Sun <yorksun@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

include/configs/corenet_ds.h

@@ -607,14 +607,17 @@
 #define CONFIG_BAUDRATE	115200
 
 #define	CONFIG_EXTRA_ENV_SETTINGS				\
+	"hwconfig=fsl_ddr:ctlr_intlv=cacheline,"		\
+	"bank_intlv=cs0_cs1\0"					\
 	"netdev=eth0\0"						\
 	"uboot=" MK_STR(CONFIG_UBOOTPATH) "\0"			\
-	"tftpflash=tftpboot $loadaddr $uboot; "			\
-	"protect off " MK_STR(TEXT_BASE) " +$filesize; "	\
-	"erase " MK_STR(TEXT_BASE) " +$filesize; "		\
-	"cp.b $loadaddr " MK_STR(TEXT_BASE) " $filesize; "	\
-	"protect on " MK_STR(TEXT_BASE) " +$filesize; "		\
-	"cmp.b $loadaddr " MK_STR(TEXT_BASE) " $filesize\0"	\
+	"ubootaddr=" MK_STR(TEXT_BASE) "\0"			\
+	"tftpflash=tftpboot $loadaddr $uboot && "		\
+	"protect off $ubootaddr +$filesize && "			\
+	"erase $ubootaddr +$filesize && "			\
+	"cp.b $loadaddr $ubootaddr $filesize && "		\
+	"protect on $ubootaddr +$filesize && "			\
+	"cmp.b $loadaddr $ubootaddr $filesize\0"		\
 	"consoledev=ttyS0\0"					\
 	"ramdiskaddr=2000000\0"					\
 	"ramdiskfile=p4080ds/ramdisk.uboot\0"			\