arm64/dts:rhode: turn on ldo4 of wl2866d by default

Ldo4 of wl2866d is used as vdd source of proximity sensor from EVT,
have to turn it on by default.

Change-Id: I2523f4f3b670e436300174e277487c0560602254
Reviewed-on: https://gerrit.mot.com/2127355
SME-Granted: SME Approvals Granted
SLTApproved: Slta Waiver
Tested-by: Jira Key
Reviewed-by: Xiangpo Zhao <zhaoxp3@motorola.com>
Submit-Approved: Jira Key
Reviewed-by: Nan Wu <wunan3@motorola.com>

qcom/khaje-rhode-wl2866d.dtsi

@@ -29,9 +29,10 @@
 
 			cam_pmic2_ldo4: ldo4 {
 				regulator-name = "camera_ldo4";
-				regulator-min-microvolt = <1200000>;
-				regulator-max-microvolt = <4300000>;
+				regulator-min-microvolt = <3000000>;
+				regulator-max-microvolt = <3000000>;
+				regulator-always-on;
 			};
 		};
 	};
-};
+};