staging: vt6656: sparse fixes: iwctl_giwgenie use memcpy.

extra is in kernel space use memcpy.

sparse warning
iwctl.c:1595:42: warning: incorrect type in argument 1 (different address spaces)
iwctl.c:1595:42: expected void [noderef] <asn:1>*to
iwctl.c:1595:42: got char *extra

Signed-off-by: Malcolm Priestley <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/staging/vt6656/iwctl.c

···
 	wrq->length = 0;
 	if (pMgmt->wWPAIELen > 0) {
 		wrq->length = pMgmt->wWPAIELen;
-		if (pMgmt->wWPAIELen <= space) {
-			if (copy_to_user(extra, pMgmt->abyWPAIE, pMgmt->wWPAIELen)) {
-				ret = -EFAULT;
-			}
-		} else {
+
+		if (pMgmt->wWPAIELen <= space)
+			memcpy(extra, pMgmt->abyWPAIE, pMgmt->wWPAIELen);
+		else
 			ret = -E2BIG;
-		}
 	}
 	return ret;
 }