arm64: dts: qcom: msm8998-mtp: Increase load on l21 for sdcard

l21 is used as sdcard vmmc, and needs the load increased to prevent
voltage drop issues with some sdcards.  This addresses -84 errors seen
during sdcard init with SDR104 cards.
Signed-off-by: Jeffrey Hugo <jhugo@codeaurora.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>

arch/arm64/boot/dts/qcom/msm8998-mtp.dtsi

@@ -192,6 +192,8 @@ vreg_l20a_2p95: l20 {
 		vreg_l21a_2p95: l21 {
 			regulator-min-microvolt = <2960000>;
 			regulator-max-microvolt = <2960000>;
+			regulator-allow-set-load;
+			regulator-system-load = <800000>;
 		};
 		vreg_l22a_2p85: l22 {
 			regulator-min-microvolt = <2864000>;