ec/google/wilco: Enable WiFi radio

Add EC command to enable WiFi radio and send that command at
startup.  Tested to ensure WiFi is functional on a sarien board.

Change-Id: Iac46895c7118567e1eb55ea33051a1662103b563
Signed-off-by: Duncan Laurie <dlaurie@google.com>
Reviewed-on: https://review.coreboot.org/c/29673
Reviewed-by: Furquan Shaikh <furquan@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/ec/google/wilco/chip.c b/src/ec/google/wilco/chip.c
index 0cd0048..e1f468d 100644
--- a/src/ec/google/wilco/chip.c
+++ b/src/ec/google/wilco/chip.c
@@ -66,6 +66,9 @@
 
 	/* Unmute speakers */
 	wilco_ec_send(KB_HW_MUTE_CONTROL, AUDIO_UNMUTE_125MS);
+
+	/* Enable WiFi radio */
+	wilco_ec_radio_control(RADIO_WIFI, 1);
 }
 
 static void wilco_ec_resource(struct device *dev, int index,