ARM: dts: rockchip: add sram to bus_intmem nodename for rv1108

A test with the command below gives these errors:

arch/arm/boot/dts/rv1108-elgin-r1.dt.yaml:
bus_intmem@10080000: $nodename:0: 'bus_intmem@10080000'
does not match '^sram(@.*)?'
arch/arm/boot/dts/rv1108-evb.dt.yaml:
bus_intmem@10080000: $nodename:0: 'bus_intmem@10080000'
does not match '^sram(@.*)?'

Fix this error by adding sram to the bus_intmem nodename
in rv1108.dtsi.

make ARCH=arm dtbs_check
DT_SCHEMA_FILES=Documentation/devicetree/bindings/sram/sram.yaml
Signed-off-by: Johan Jonker <jbx6244@gmail.com>
Link: https://lore.kernel.org/r/20200228155354.27206-1-jbx6244@gmail.comSigned-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm/boot/dts/rv1108.dtsi

@@ -102,7 +102,7 @@ pdma: pdma@102a0000 {
 		};
 	};
 
-	bus_intmem@10080000 {
+	bus_intmem: sram@10080000 {
 		compatible = "mmio-sram";
 		reg = <0x10080000 0x2000>;
 		#address-cells = <1>;