ARM: dts: qcom: pm8941: align SPMI PMIC LPG node name with dtschema

Bindings expect LPG/PWM node name to be "pwm":

pmic@5: 'lpg' does not match any of the regexes

Signed-off-by: Krzysztof Kozlowski <[e-mail]>
Reviewed-by: David Heidelberg <[e-mail]>
Reviewed-by: Stephen Boyd <[e-mail]>
Reviewed-by: Vinod Koul <[e-mail]>
Signed-off-by: Bjorn Andersson <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

arch/arm/boot/dts/qcom-pm8941.dtsi

···
 		#address-cells = <1>;
 		#size-cells = <0>;
 
-		pm8941_lpg: lpg {
+		pm8941_lpg: pwm {
 			compatible = "qcom,pm8941-lpg";
 
 			#address-cells = <1>;