ARM: dts: s3c6410: align node SROM bus node name with dtschema in Mini6410

The SROM controller is modeled with a bus so align the device node name
with dtschema to fix warning:

srom-cs1@18000000: $nodename:0: 'srom-cs1@18000000'
does not match '^([a-z][a-z0-9\\-]+-bus|bus|soc|axi|ahb|apb)(@[0-9a-f]+)?$'

Signed-off-by: Krzysztof Kozlowski <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

arch/arm/boot/dts/s3c6410-mini6410.dts

···
 		#clock-cells = <0>;
 	};
 
-	srom-cs1@18000000 {
+	srom-cs1-bus@18000000 {
 		compatible = "simple-bus";
 		#address-cells = <1>;
 		#size-cells = <1>;