ARM: dts: arm: align watchdog and mmc node names with dtschema

Align the watchdog and mmc device node names with the schema to fix
warnings like:

  mmci@50000: $nodename:0: 'mmci@50000' does not match '^mmc(@.*)?$'
  wdt@f0000: $nodename:0: 'wdt@f0000' does not match '^watchdog(@.*|-[0-9a-f])?$'

Link: https://lore.kernel.org/r/20210820081733.83976-2-krzysztof.kozlowski@canonical.comAcked-by: Liviu Dudau <liviu.dudau@arm.com>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>

arch/arm/boot/dts/vexpress-v2m-rs1.dtsi

@@ -215,7 +215,7 @@ aaci@40000 {
 					clock-names = "apb_pclk";
 				};
 
-				mmci@50000 {
+				mmc@50000 {
 					compatible = "arm,pl180", "arm,primecell";
 					reg = <0x050000 0x1000>;
 					interrupts = <9>, <10>;
@@ -275,7 +275,7 @@ v2m_serial3: serial@c0000 {
 					clock-names = "uartclk", "apb_pclk";
 				};
 
-				wdt@f0000 {
+				watchdog@f0000 {
 					compatible = "arm,sp805", "arm,primecell";
 					reg = <0x0f0000 0x1000>;
 					interrupts = <0>;