arm/dts: add HAC aw8155 enable signal

Odessa uses AW8155 to driver earpiece when HAC is on,
GPIO68 is HAC_EN signal.

Change-Id: I6c0977ce069ea71d1ea465274184890ca5886822
Signed-off-by: zhouwl <zhouwl@lenovo.com>
Reviewed-on: https://gerrit.mot.com/1601642
SLTApproved: Slta Waiver
SME-Granted: SME Approvals Granted
Tested-by: Jira Key
Reviewed-by: Hujun Liao <liaohj@motorola.com>
Submit-Approved: Jira Key

qcom/bengal-borneo-audio-overlay.dtsi

@@ -95,6 +95,7 @@
 	qcom,mi2s-audio-intf = <1>;
 	qcom,pri-mi2s-gpios = <&cdc_pri_mi2s_gpios>;
 	aw,have-882xx = <1>;
+	qcom,ext-hac-gpio = <&tlmm 68 0>;
 	qcom,wsa-max-devs = <0>;
 	/delete-property/ qcom,wsa-devs;
 	/delete-property/ qcom,wsa-aux-dev-prefix;