ARM: dts: Configure simple-pm-bus for dra7 l4_cfg

We can now probe interconnects with device tree only configuration using
simple-pm-bus and genpd.
Tested-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/boot/dts/dra7-l4.dtsi

 &l4_cfg {						/* 0x4a000000 */
-	compatible = "ti,dra7-l4-cfg", "simple-bus";
+	compatible = "ti,dra7-l4-cfg", "simple-pm-bus";
+	power-domains = <&prm_coreaon>;
+	clocks = <&l4cfg_clkctrl DRA7_L4CFG_L4_CFG_CLKCTRL 0>;
+	clock-names = "fck";
 	reg = <0x4a000000 0x800>,
 	      <0x4a000800 0x800>,
 	      <0x4a001000 0x1000>;
@@ -11,7 +14,7 @@ &l4_cfg {						/* 0x4a000000 */
 		 <0x00200000 0x4a200000 0x100000>;	/* segment 2 */
 
 	segment@0 {					/* 0x4a000000 */
-		compatible = "simple-bus";
+		compatible = "simple-pm-bus";
 		#address-cells = <1>;
 		#size-cells = <1>;
 		ranges = <0x00000000 0x00000000 0x000800>,	/* ap 0 */
@@ -493,7 +496,7 @@ hwspinlock: spinlock@0 {
 	};
 
 	segment@100000 {					/* 0x4a100000 */
-		compatible = "simple-bus";
+		compatible = "simple-pm-bus";
 		#address-cells = <1>;
 		#size-cells = <1>;
 		ranges = <0x00002000 0x00102000 0x001000>,	/* ap 27 */
@@ -812,7 +815,7 @@ target-module@87000 {			/* 0x4a187000, ap 75 74.0 */
 	};
 
 	segment@200000 {					/* 0x4a200000 */
-		compatible = "simple-bus";
+		compatible = "simple-pm-bus";
 		#address-cells = <1>;
 		#size-cells = <1>;
 		ranges = <0x00018000 0x00218000 0x001000>,	/* ap 43 */