mtd: gpmi: add missing include 'module.h'

Fixes:

drivers/mtd/nand/gpmi-nand/gpmi-nand.c: In function 'gpmi_nfc_init':
drivers/mtd/nand/gpmi-nand/gpmi-nand.c:1475:16: error: 'THIS_MODULE' undeclared (first use in this function)
drivers/mtd/nand/gpmi-nand/gpmi-nand.c:1475:16: note: each undeclared identifier is reported only once for each function it appears in
drivers/mtd/nand/gpmi-nand/gpmi-nand.c: At top level:
drivers/mtd/nand/gpmi-nand/gpmi-nand.c:1617:15: error: expected declaration specifiers or '...' before string constant
drivers/mtd/nand/gpmi-nand/gpmi-nand.c:1617:1: warning: data definition has no type or storage class
drivers/mtd/nand/gpmi-nand/gpmi-nand.c:1617:1: warning: type defaults to 'int' in declaration of 'MODULE_AUTHOR'

and some more...

Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Huang Shijie <b32955@freescale.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

drivers/mtd/nand/gpmi-nand/gpmi-nand.c

@@ -21,9 +21,9 @@
 #include <linux/clk.h>
 #include <linux/slab.h>
 #include <linux/interrupt.h>
+#include <linux/module.h>
 #include <linux/mtd/gpmi-nand.h>
 #include <linux/mtd/partitions.h>
-
 #include "gpmi-nand.h"
 
 /* add our owner bbt descriptor */