powerpc: Add P3041DS/P5020DS board support (uses corenet_ds code)

The P3041DS & P5020DS boards are almost identical (except for the
processor in them).  Additionally they are based on the P4080DS board
design so we use the some board code for all 3 boards.

Some ngPIXIS (FPGA) registers where reserved on P4080DS and now have
meaning on P3041DS/P5020DS.  We utilize some of these for SERDES clock
configuration.

Additionally, the P3041DS/P5020DS support NAND.

Signed-off-by: Timur Tabi <timur@freescale.com>
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 ac83a6e..a71b1bb 100644
--- a/boards.cfg
+++ b/boards.cfg
@@ -558,8 +558,10 @@
 P2020RDB_NAND                powerpc     mpc85xx     p1_p2_rdb           freescale      -           P1_P2_RDB:P2020RDB,NAND
 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
 P4080DS                      powerpc     mpc85xx     corenet_ds          freescale
 P4080DS_RAMBOOT_PBL          powerpc     mpc85xx     corenet_ds          freescale      -           P4080DS:RAMBOOT_PBL,SYS_TEXT_BASE=0xFFF80000
+P5020DS                      powerpc     mpc85xx     corenet_ds          freescale
 mpq101                       powerpc     mpc85xx     mpq101              mercury        -           mpq101
 stxgp3                       powerpc     mpc85xx     stxgp3              stx
 stxssa                       powerpc     mpc85xx     stxssa              stx            -           stxssa