arm64: dts: qcom: qrb4210-rb2: Enable load setting on SDHCI VQMMC

The MMC core calls regulator_set_load on VQMMC, enable loadsetting to
make it effective.

Fixes: 8d58a8c0 ("arm64: dts: qcom: Add base qrb4210-rb2 board dts")
Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Reviewed-and-Tested-by: Bhupesh Sharma <bhupesh.sharma@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230515-topic-rb2-bits-v1-4-a52d154a639d@linaro.org

arch/arm64/boot/dts/qcom/qrb4210-rb2.dts

@@ -267,6 +267,7 @@ vreg_l4a_0p9: l4 {
 		vreg_l5a_2p96: l5 {
 			regulator-min-microvolt = <1648000>;
 			regulator-max-microvolt = <3056000>;
+			regulator-allow-set-load;
 		};
 
 		vreg_l6a_0p6: l6 {
@@ -297,6 +298,7 @@ vreg_l10a_1p8: l10 {
 		vreg_l11a_1p8: l11 {
 			regulator-min-microvolt = <1704000>;
 			regulator-max-microvolt = <1952000>;
+			regulator-allow-set-load;
 		};
 
 		vreg_l12a_1p8: l12 {