spi: update MSIOF includes

Update the MSIOF driver to remove the architecture
speficic spi header file and add err.h. This makes
the driver compile on non-SH architectures.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>

drivers/spi/spi_sh_msiof.c

@@ -20,12 +20,12 @@
 #include <linux/bitmap.h>
 #include <linux/clk.h>
 #include <linux/io.h>
+#include <linux/err.h>
 
 #include <linux/spi/spi.h>
 #include <linux/spi/spi_bitbang.h>
 #include <linux/spi/sh_msiof.h>
 
-#include <asm/spi.h>
 #include <asm/unaligned.h>
 
 struct sh_msiof_spi_priv {