Driver/IFC: Move Freescale IFC driver to a common driver

Freescale IFC controller has been used for mpc8xxx. It will be used
for ARM-based SoC as well. This patch moves the driver to driver/misc
and fix the header file includes.

Signed-off-by: York Sun <yorksun@freescale.com>
diff --git a/drivers/mtd/nand/fsl_ifc_nand.c b/drivers/mtd/nand/fsl_ifc_nand.c
index 98a09c0..3b845b9 100644
--- a/drivers/mtd/nand/fsl_ifc_nand.c
+++ b/drivers/mtd/nand/fsl_ifc_nand.c
@@ -17,7 +17,7 @@
 
 #include <asm/io.h>
 #include <asm/errno.h>
-#include <asm/fsl_ifc.h>
+#include <fsl_ifc.h>
 
 #define FSL_IFC_V1_1_0	0x01010000
 #define MAX_BANKS	4