ARM: dts: Move omap4 mmio-sram out of l3 interconnect

We need mmio-sram early for omap4_sram_init() for IO barrier init, and
will be moving l3 interconnect to probe with simple-pm-bus that probes
at module_init() time. So let's move mmio-sram out of l3 to prepare for
that.

Otherwise we will get the following after probing the interconnects with
simple-pm-bus:

omap4_sram_init:Unable to get sram pool needed to handle errata I688
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/boot/dts/omap4.dtsi

@@ -58,6 +58,15 @@ cpu@1 {
 		};
 	};
 
+	/*
+	 * Needed early by omap4_sram_init() for barrier, do not move to l3
+	 * interconnect as simple-pm-bus probes at module_init() time.
+	 */
+	ocmcram: sram@40304000 {
+		compatible = "mmio-sram";
+		reg = <0x40304000 0xa000>; /* 40k */
+	};
+
 	gic: interrupt-controller@48241000 {
 		compatible = "arm,cortex-a9-gic";
 		interrupt-controller;
@@ -136,11 +145,6 @@ mpu {
 		l4_abe: interconnect@40100000 {
 		};
 
-		ocmcram: sram@40304000 {
-			compatible = "mmio-sram";
-			reg = <0x40304000 0xa000>; /* 40k */
-		};
-
 		target-module@50000000 {
 			compatible = "ti,sysc-omap2", "ti,sysc";
 			reg = <0x50000000 4>,