mfd: don't use memzero

For it doesn't exist on i386.

Cc: Ian Molton <spyro@f2s.com>
Cc: Dmitry Baryshkov <dbaryshkov@gmail.com>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/mfd/mfd-core.c

@@ -36,7 +36,7 @@ static int mfd_add_device(struct platform_device *parent,
 	if (ret)
 		goto fail_device;
 
-	memzero(res, sizeof(res));
+	memset(res, 0, sizeof(res));
 	for (r = 0; r < cell->num_resources; r++) {
 		res[r].name = cell->resources[r].name;
 		res[r].flags = cell->resources[r].flags;