[MTD] Make init_impa7 static

The function init_impa7 does not need to be global, and
this patch makes it static by adding the needed keyword
to drivers/mtd/maps/impa7.c.
Signed-off-by: NDmitri Vorobiev <dmitri.vorobiev@movial.fi>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

drivers/mtd/maps/impa7.c

@@ -70,7 +70,7 @@ static struct mtd_partition *mtd_parts[NUM_FLASHBANKS];
 
 static const char *probes[] = { "cmdlinepart", NULL };
 
-int __init init_impa7(void)
+static int __init init_impa7(void)
 {
 	static const char *rom_probe_types[] = PROBETYPES;
 	const char **type;