configs: engicam: Rename nand with gpmi-name in mtdparts

gpmi-nand is the proper name used in nand driver from Linux for all
imx related nand boards, so rename mtdparts name as gpmi-nand instead
of nand, this will eventually reflects all nand info to Linux from
u-boot like mtdparts.

Cc: Stefano Babic <sbabic@denx.de>
Cc: Matteo Lisi <matteo.lisi@engicam.com>
Cc: Michael Trimarchi <michael@amarulasolutions.com>
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>

include/configs/imx6qdl_icore.h

@@ -129,8 +129,8 @@
 # define CONFIG_MTD_DEVICE
 # define CONFIG_CMD_MTDPARTS
 # define CONFIG_MTD_PARTITIONS
-# define MTDIDS_DEFAULT			"nand0=nand"
-# define MTDPARTS_DEFAULT		"mtdparts=nand:2m(spl),2m(uboot)," \
+# define MTDIDS_DEFAULT			"nand0=gpmi-nand"
+# define MTDPARTS_DEFAULT		"mtdparts=gpmi-nand:2m(spl),2m(uboot)," \
 					"1m(env),8m(kernel),1m(dtb),-(rootfs)"
 
 # define CONFIG_APBH_DMA

include/configs/imx6ul_geam.h

@@ -128,8 +128,8 @@
 # define CONFIG_MTD_DEVICE
 # define CONFIG_CMD_MTDPARTS
 # define CONFIG_MTD_PARTITIONS
-# define MTDIDS_DEFAULT			"nand0=nand"
-# define MTDPARTS_DEFAULT		"mtdparts=nand:2m(spl),2m(uboot)," \
+# define MTDIDS_DEFAULT			"nand0=gpmi-nand"
+# define MTDPARTS_DEFAULT		"mtdparts=gpmi-nand:2m(spl),2m(uboot)," \
 					"1m(env),8m(kernel),1m(dtb),-(rootfs)"
 
 # define CONFIG_APBH_DMA