arm64: dts: ti: k3-am65-main: Remove "syscon" nodes added for pcieX_ctrl

Remove "syscon" nodes added for pcieX_ctrl and have the PCIe node
point to the parent with an offset argument. This change is as
discussed in [1].

[1] http://lore.kernel.org/r/CAL_JsqKiUcO76bo1GoepWM1TusJWoty_BRy2hFSgtEVMqtrvvQ@mail.gmail.comSigned-off-by: Nishanth Menon <nm@ti.com>
Link: https://lore.kernel.org/r/20230424144949.244135-2-nm@ti.comSigned-off-by: Vignesh Raghavendra <vigneshr@ti.com>

arch/arm64/boot/dts/ti/k3-am65-main.dtsi

@@ -481,21 +481,6 @@ scm_conf: scm-conf@100000 {
 		#size-cells = <1>;
 		ranges = <0x0 0x0 0x00100000 0x1c000>;
 
-		pcie0_mode: pcie-mode@4060 {
-			compatible = "syscon";
-			reg = <0x00004060 0x4>;
-		};
-
-		pcie1_mode: pcie-mode@4070 {
-			compatible = "syscon";
-			reg = <0x00004070 0x4>;
-		};
-
-		pcie_devid: pcie-devid@210 {
-			compatible = "syscon";
-			reg = <0x00000210 0x4>;
-		};
-
 		serdes0_clk: clock@4080 {
 			compatible = "syscon";
 			reg = <0x00004080 0x4>;
@@ -883,8 +868,8 @@ pcie0_rc: pcie@5500000 {
 		#size-cells = <2>;
 		ranges = <0x81000000 0 0          0x0 0x10020000 0 0x00010000>,
 			 <0x82000000 0 0x10030000 0x0 0x10030000 0 0x07FD0000>;
-		ti,syscon-pcie-id = <&pcie_devid>;
-		ti,syscon-pcie-mode = <&pcie0_mode>;
+		ti,syscon-pcie-id = <&scm_conf 0x210>;
+		ti,syscon-pcie-mode = <&scm_conf 0x4060>;
 		bus-range = <0x0 0xff>;
 		num-viewport = <16>;
 		max-link-speed = <2>;
@@ -900,7 +885,7 @@ pcie0_ep: pcie-ep@5500000 {
 		reg = <0x0 0x5500000 0x0 0x1000>, <0x0 0x5501000 0x0 0x1000>, <0x0 0x10000000 0x0 0x8000000>, <0x0 0x5506000 0x0 0x1000>;
 		reg-names = "app", "dbics", "addr_space", "atu";
 		power-domains = <&k3_pds 120 TI_SCI_PD_EXCLUSIVE>;
-		ti,syscon-pcie-mode = <&pcie0_mode>;
+		ti,syscon-pcie-mode = <&scm_conf 0x4060>;
 		num-ib-windows = <16>;
 		num-ob-windows = <16>;
 		max-link-speed = <2>;
@@ -918,8 +903,8 @@ pcie1_rc: pcie@5600000 {
 		#size-cells = <2>;
 		ranges = <0x81000000 0 0          0x0   0x18020000 0 0x00010000>,
 			 <0x82000000 0 0x18030000 0x0   0x18030000 0 0x07FD0000>;
-		ti,syscon-pcie-id = <&pcie_devid>;
-		ti,syscon-pcie-mode = <&pcie1_mode>;
+		ti,syscon-pcie-id = <&scm_conf 0x210>;
+		ti,syscon-pcie-mode = <&scm_conf 0x4070>;
 		bus-range = <0x0 0xff>;
 		num-viewport = <16>;
 		max-link-speed = <2>;
@@ -935,7 +920,7 @@ pcie1_ep: pcie-ep@5600000 {
 		reg = <0x0 0x5600000 0x0 0x1000>, <0x0 0x5601000 0x0 0x1000>, <0x0 0x18000000 0x0 0x4000000>, <0x0 0x5606000 0x0 0x1000>;
 		reg-names = "app", "dbics", "addr_space", "atu";
 		power-domains = <&k3_pds 121 TI_SCI_PD_EXCLUSIVE>;
-		ti,syscon-pcie-mode = <&pcie1_mode>;
+		ti,syscon-pcie-mode = <&scm_conf 0x4070>;
 		num-ib-windows = <16>;
 		num-ob-windows = <16>;
 		max-link-speed = <2>;