ARM: dts: qcom: switch to RPMPD_* indices

Use generic RPMPD_* defines for power domain instead of using
platform-specific defines.

Reviewed-by: Bjorn Andersson <andersson@kernel.org>
Acked-by: Bjorn Andersson <andersson@kernel.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20251211-rework-rpmhpd-rpmpd-v2-2-a5ec4028129f@oss.qualcomm.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>

Author: lumag

arch/arm/boot/dts/qcom/qcom-msm8226.dtsi

@@ -959,7 +959,7 @@
 			resets = <&gcc GCC_MSS_RESTART>;
 			reset-names = "mss_restart";
 
-			power-domains = <&rpmpd MSM8226_VDDCX>;
+			power-domains = <&rpmpd RPMPD_VDDCX>;
 			power-domain-names = "cx";
 
 			qcom,ext-bhs-reg = <&tcsr_regs_1 0x194>;
@@ -1372,7 +1372,7 @@
 					      <&adsp_smp2p_in 3 IRQ_TYPE_EDGE_RISING>;
 			interrupt-names = "wdog", "fatal", "ready", "handover", "stop-ack";
 
-			power-domains = <&rpmpd MSM8226_VDDCX>;
+			power-domains = <&rpmpd RPMPD_VDDCX>;
 			power-domain-names = "cx";
 
 			clocks = <&rpmcc RPM_SMD_XO_CLK_SRC>;