net/ethernet/freescale/fman: fix cross-build error

CC [M] drivers/net/ethernet/freescale/fman/fman.o
In file included from ../drivers/net/ethernet/freescale/fman/fman.c:35:
../include/linux/fsl/guts.h: In function 'guts_set_dmacr':
../include/linux/fsl/guts.h:165:2: error: implicit declaration of function 'clrsetbits_be32' [-Werror=implicit-function-declaration]
clrsetbits_be32(&guts->dmacr, 3 << shift, device << shift);
^~~~~~~~~~~~~~~

Signed-off-by: Randy Dunlap <[e-mail]>
Cc: Madalin Bucur <[e-mail]>
Cc: [e-mail]
Cc: [e-mail]
Signed-off-by: David S. Miller <[e-mail]>

include/linux/fsl/guts.h

···
 #define __FSL_GUTS_H__
 
 #include <linux/types.h>
+#include <linux/io.h>
 
 /**
  * Global Utility Registers.