uwb: use kcalloc where appropriate

Signed-off-by: David Vrabel <david.vrabel@csr.com>
diff --git a/drivers/usb/wusbcore/mmc.c b/drivers/usb/wusbcore/mmc.c
index e5390b7..7690728 100644
--- a/drivers/usb/wusbcore/mmc.c
+++ b/drivers/usb/wusbcore/mmc.c
@@ -43,7 +43,7 @@
 int wusbhc_mmcie_create(struct wusbhc *wusbhc)
 {
 	u8 mmcies = wusbhc->mmcies_max;
-	wusbhc->mmcie = kzalloc(mmcies * sizeof(wusbhc->mmcie[0]), GFP_KERNEL);
+	wusbhc->mmcie = kcalloc(mmcies, sizeof(wusbhc->mmcie[0]), GFP_KERNEL);
 	if (wusbhc->mmcie == NULL)
 		return -ENOMEM;
 	mutex_init(&wusbhc->mmcie_mutex);