powerpc/85xx: Rework P1_P2_RDB pci_init_board to use common FSL PCIe code

Remove duplicated code in P1_P2_RDB boards and utilize the common
fsl_pcie_init_board().  We also now dynamically setup the LAWs for PCI
controllers based on which PCIe controllers are enabled.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
diff --git a/include/configs/P1_P2_RDB.h b/include/configs/P1_P2_RDB.h
index d479a09..6862e6d 100644
--- a/include/configs/P1_P2_RDB.h
+++ b/include/configs/P1_P2_RDB.h
@@ -358,6 +358,7 @@
  */
 
 /* controller 2, Slot 2, tgtid 2, Base address 9000 */
+#define CONFIG_SYS_PCIE2_NAME		"Slot 1"
 #define CONFIG_SYS_PCIE2_MEM_VIRT	0xa0000000
 #define CONFIG_SYS_PCIE2_MEM_BUS	0xa0000000
 #define CONFIG_SYS_PCIE2_MEM_PHYS	0xa0000000
@@ -368,6 +369,7 @@
 #define CONFIG_SYS_PCIE2_IO_SIZE	0x00010000	/* 64k */
 
 /* controller 1, Slot 1, tgtid 1, Base address a000 */
+#define CONFIG_SYS_PCIE1_NAME		"Slot 2"
 #define CONFIG_SYS_PCIE1_MEM_VIRT	0xc0000000
 #define CONFIG_SYS_PCIE1_MEM_BUS	0xc0000000
 #define CONFIG_SYS_PCIE1_MEM_PHYS	0xc0000000