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/board/freescale/common/ngpixis.h b/board/freescale/common/ngpixis.h
index 681b0d0..1d4483d 100644
--- a/board/freescale/common/ngpixis.h
+++ b/board/freescale/common/ngpixis.h
@@ -20,16 +20,17 @@
 	u8 scver;
 	u8 csr;
 	u8 rst;
-	u8 res1;
+	u8 serclk;
 	u8 aux;
 	u8 spd;
 	u8 brdcfg0;
 	u8 brdcfg1;	/* On some boards, this register is called 'dma' */
 	u8 addr;
-	u8 res2[2];
+	u8 brdcfg2;
+	u8 gpiodir;
 	u8 data;
 	u8 led;
-	u8 res3;
+	u8 tag;
 	u8 vctl;
 	u8 vstat;
 	u8 vcfgen0;