zd1201: use kzalloc

Use kzalloc instead of kmalloc + memset.

The semantic patch that makes this change is:
(https://coccinelle.gitlabpages.inria.fr/website/)

//<smpl>
@@
expression res, size, flag;
@@
- res = kmalloc(size, flag);
+ res = kzalloc(size, flag);
  ...
- memset(res, 0, size);
//</smpl>
Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20220312102705.71413-6-Julia.Lawall@inria.fr

drivers/net/wireless/zydas/zd1201.c

@@ -521,7 +521,7 @@ static int zd1201_setconfig(struct zd1201 *zd, int rid, const void *buf, int len
 	zd->rxdatas = 0;
 	zd->rxlen = 0;
 	for (seq=0; len > 0; seq++) {
-		request = kmalloc(16, gfp_mask);
+		request = kzalloc(16, gfp_mask);
 		if (!request)
 			return -ENOMEM;
 		urb = usb_alloc_urb(0, gfp_mask);
@@ -529,7 +529,6 @@ static int zd1201_setconfig(struct zd1201 *zd, int rid, const void *buf, int len
 			kfree(request);
 			return -ENOMEM;
 		}
-		memset(request, 0, 16);
 		reqlen = len>12 ? 12 : len;
 		request[0] = ZD1201_USB_RESREQ;
 		request[1] = seq;