powerpc/t4rdb: Add support of CPLD

This support of CPLD includes

    - Files and register definitions
    - Command to switch alternate bank
    - Command to switch default bank

Signed-off-by: Chunhe Lan <Chunhe.Lan@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>
diff --git a/board/freescale/t4rdb/tlb.c b/board/freescale/t4rdb/tlb.c
index 4b50bcd..474301e 100644
--- a/board/freescale/t4rdb/tlb.c
+++ b/board/freescale/t4rdb/tlb.c
@@ -106,6 +106,11 @@
 		      MAS3_SX|MAS3_SW|MAS3_SR, MAS2_I|MAS2_G,
 		      0, 16, BOOKE_PAGESZ_64K, 1),
 #endif
+#ifdef CONFIG_SYS_CPLD_BASE
+	SET_TLB_ENTRY(1, CONFIG_SYS_CPLD_BASE, CONFIG_SYS_CPLD_BASE_PHYS,
+		      MAS3_SW|MAS3_SW|MAS3_SR, MAS2_I|MAS2_G,
+		      0, 17, BOOKE_PAGESZ_4K, 1),
+#endif
 };
 
 int num_tlb_entries = ARRAY_SIZE(tlb_table);