net: wireless: replace strict_strtoul() with kstrtoul()

The usage of strict_strtoul() is not preferred, because
strict_strtoul() is obsolete. Thus, kstrtoul() should be
used.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/wireless/iwlegacy/3945-mac.c b/drivers/net/wireless/iwlegacy/3945-mac.c
index b37a582..dce5e8f 100644
--- a/drivers/net/wireless/iwlegacy/3945-mac.c
+++ b/drivers/net/wireless/iwlegacy/3945-mac.c
@@ -3119,7 +3119,7 @@
 	unsigned long val;
 	int ret;
 
-	ret = strict_strtoul(buf, 0, &val);
+	ret = kstrtoul(buf, 0, &val);
 	if (ret)
 		IL_INFO("%s is not in hex or decimal form.\n", buf);
 	else