powerpc/85xx: Add NAND boot support for P3041/P5020DS

When booting from NAND we get the environment and FMan ucode from NAND.

Signed-off-by: Shaohui Xie <b21989@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
diff --git a/boards.cfg b/boards.cfg
index e682f76..c1623f3 100644
--- a/boards.cfg
+++ b/boards.cfg
@@ -596,12 +596,14 @@
 P2020RDB_SDCARD              powerpc     mpc85xx     p1_p2_rdb           freescale      -           P1_P2_RDB:P2020RDB,SDCARD
 P2020RDB_SPIFLASH            powerpc     mpc85xx     p1_p2_rdb           freescale      -           P1_P2_RDB:P2020RDB,SPIFLASH
 P3041DS                      powerpc     mpc85xx     corenet_ds          freescale
+P3041DS_NAND		     powerpc     mpc85xx     corenet_ds          freescale      -           P3041DS:RAMBOOT_PBL,NAND,SYS_TEXT_BASE=0xFFF80000
 P3041DS_SDCARD		     powerpc     mpc85xx     corenet_ds          freescale      -           P3041DS:RAMBOOT_PBL,SDCARD,SYS_TEXT_BASE=0xFFF80000
 P3041DS_SPIFLASH	     powerpc     mpc85xx     corenet_ds          freescale      -           P3041DS:RAMBOOT_PBL,SPIFLASH,SYS_TEXT_BASE=0xFFF80000
 P4080DS                      powerpc     mpc85xx     corenet_ds          freescale
 P4080DS_SDCARD		     powerpc     mpc85xx     corenet_ds          freescale      -           P4080DS:RAMBOOT_PBL,SDCARD,SYS_TEXT_BASE=0xFFF80000
 P4080DS_SPIFLASH	     powerpc     mpc85xx     corenet_ds          freescale      -           P4080DS:RAMBOOT_PBL,SPIFLASH,SYS_TEXT_BASE=0xFFF80000
 P5020DS                      powerpc     mpc85xx     corenet_ds          freescale
+P5020DS_NAND		     powerpc     mpc85xx     corenet_ds          freescale      -           P5020DS:RAMBOOT_PBL,NAND,SYS_TEXT_BASE=0xFFF80000
 P5020DS_SDCARD		     powerpc     mpc85xx     corenet_ds          freescale      -           P5020DS:RAMBOOT_PBL,SDCARD,SYS_TEXT_BASE=0xFFF80000
 P5020DS_SPIFLASH	     powerpc     mpc85xx     corenet_ds          freescale      -           P5020DS:RAMBOOT_PBL,SPIFLASH,SYS_TEXT_BASE=0xFFF80000
 mpq101                       powerpc     mpc85xx     mpq101              mercury        -           mpq101