global: Migrate CONFIG_MXC_NAND_IP_REGS_BASE to CFG

Perform a simple rename of CONFIG_MXC_NAND_IP_REGS_BASE to CFG_MXC_NAND_IP_REGS_BASE

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/drivers/mtd/nand/raw/mxc_nand.c b/drivers/mtd/nand/raw/mxc_nand.c
index 8aa5f73..10679b2 100644
--- a/drivers/mtd/nand/raw/mxc_nand.c
+++ b/drivers/mtd/nand/raw/mxc_nand.c
@@ -1175,7 +1175,7 @@
 	host->regs = (struct mxc_nand_regs __iomem *)CONFIG_MXC_NAND_REGS_BASE;
 #ifdef MXC_NFC_V3_2
 	host->ip_regs =
-		(struct mxc_nand_ip_regs __iomem *)CONFIG_MXC_NAND_IP_REGS_BASE;
+		(struct mxc_nand_ip_regs __iomem *)CFG_MXC_NAND_IP_REGS_BASE;
 #endif
 	host->clk_act = 1;