wl1251, wlcore: fix spelling mistake "buld" -> "build"

There are spelling mistakes in warning messages. Fix these.
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20200806113326.53779-1-colin.king@canonical.com

drivers/net/wireless/ti/wl1251/main.c

@@ -558,7 +558,7 @@ static int wl1251_build_null_data(struct wl1251 *wl)
 out:
 	dev_kfree_skb(skb);
 	if (ret)
-		wl1251_warning("cmd buld null data failed: %d", ret);
+		wl1251_warning("cmd build null data failed: %d", ret);
 
 	return ret;
 }

drivers/net/wireless/ti/wlcore/cmd.c

@@ -1080,7 +1080,7 @@ int wl12xx_cmd_build_null_data(struct wl1271 *wl, struct wl12xx_vif *wlvif)
 out:
 	dev_kfree_skb(skb);
 	if (ret)
-		wl1271_warning("cmd buld null data failed %d", ret);
+		wl1271_warning("cmd build null data failed %d", ret);
 
 	return ret;