boards: ti: lp_em_cc2340r5: Add GPIO support

Enable GPIO.

Signed-off-by: Lars Thalian Morstad <l-morstad@ti.com>
Signed-off-by: Vebjorn Myklebust <v.myklebust@ti.com>
Signed-off-by: Stoyan Bogdanov <sbogdanov@baylibre.com>
Signed-off-by: Julien Panis <jpanis@baylibre.com>

Author: bogdanovs

boards/ti/lp_em_cc2340r5/lp_em_cc2340r5.dts

@@ -19,3 +19,7 @@
 		zephyr,code-partition = &slot0_partition;
 	};
 };
+
+&gpio0 {
+	status = "okay";
+};