ARM: dts: omap: Rename "ocmcram" node to "sram"

The device node name should reflect generic class of a device so rename
the "ocmcram" node to "sram".  This will be also in sync with upcoming DT
schema.  No functional change.
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/boot/dts/omap4.dtsi

@@ -148,7 +148,7 @@ l4_per: interconnect@48000000 {
 		l4_abe: interconnect@40100000 {
 		};
 
-		ocmcram: ocmcram@40304000 {
+		ocmcram: sram@40304000 {
 			compatible = "mmio-sram";
 			reg = <0x40304000 0xa000>; /* 40k */
 		};

arch/arm/boot/dts/omap5.dtsi

@@ -162,7 +162,7 @@ l4_per: interconnect@48000000 {
 		l4_abe: interconnect@40100000 {
 		};
 
-		ocmcram: ocmcram@40300000 {
+		ocmcram: sram@40300000 {
 			compatible = "mmio-sram";
 			reg = <0x40300000 0x20000>; /* 128k */
 		};