arm/dts: Modify Sar Sensor VDD From 2.4V To 2.8V

Sar Sensor VDD voltage is low,
modify Sar Sensor VDD From 2.4V To 2.8V.

Change-Id: I8d8ee19a9b4941a8defaa9ef6930e8682f8c41c2
Signed-off-by: xiewen3 <xiewen3@motorola.com>
Reviewed-on: https://gerrit.mot.com/1615784
SLTApproved: Slta Waiver
SME-Granted: SME Approvals Granted
Tested-by: Jira Key
Reviewed-by: Xiangpo Zhao <zhaoxp3@motorola.com>
Submit-Approved: Jira Key

qcom/bengal-guamna-common-overlay.dtsi

@@ -226,6 +226,12 @@
 	qcom,support-2a-dcp;
 };
 
+&L21A {
+	regulator-min-microvolt = <2700000>;
+	regulator-max-microvolt = <3600000>;
+	qcom,init-voltage = <2800000>;
+};
+
 &qupv3_se0_i2c {
 	status = "ok"
 	abov_sar@20 {