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/arch/powerpc/cpu/mpc85xx/spl_minimal.c b/arch/powerpc/cpu/mpc85xx/spl_minimal.c
index 199b33e..9e4c6c9 100644
--- a/arch/powerpc/cpu/mpc85xx/spl_minimal.c
+++ b/arch/powerpc/cpu/mpc85xx/spl_minimal.c
@@ -7,7 +7,7 @@
 #include <common.h>
 #include <asm/processor.h>
 #include <asm/global_data.h>
-#include <asm/fsl_ifc.h>
+#include <fsl_ifc.h>
 #include <asm/io.h>
 
 DECLARE_GLOBAL_DATA_PTR;