powerpc/85xx: Add basic support for P1023RDS board

The P1023RDS board is the reference board for the P1023 SoC.

Add support for booting it from NOR or NAND, with fixed 2G of DDR, PCIe,
UART, I2C, etc.

Signed-off-by: Roy Zang <tie-fei.zang@freescale.com>
Signed-off-by: Haiying Wang <Haiying.Wang@freescale.com>
Signed-off-by: Chunhe Lan <Chunhe.Lan@freescale.com>
Signed-off-by: Lei Xu <B33228@freescale.com>
Signed-off-by: York Sun <yorksun@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
diff --git a/MAINTAINERS b/MAINTAINERS
index ee4e8d5..143f31b 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -517,6 +517,7 @@
 Roy Zang <tie-fei.zang@freescale.com>
 
 	mpc7448hpc2	MPC7448
+	P1023RDS	P1023
 
 John Zhan <zhanz@sinovee.com>