arm64: dts: mt8183-evb: Fix unit name warnings

Remove the unit address from the DT nodes that doesn't have a reg
property. This fixes the following unit name warnings:

    Warning (unit_address_vs_reg): /soc/pinctrl@10005000/mmc0@0: node has a unit name, but no reg or ranges property
    Warning (unit_address_vs_reg): /soc/pinctrl@10005000/mmc1@0: node has a unit name, but no reg or ranges property
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Tested-by: Hsin-Yi Wang <hsinyi@chromium.org>
Link: https://lore.kernel.org/r/20200625101757.101775-6-enric.balletbo@collabora.comSigned-off-by: Matthias Brugger <matthias.bgg@gmail.com>

arch/arm64/boot/dts/mediatek/mt8183-evb.dts

@@ -205,7 +205,7 @@ pins_rst {
 		};
 	};
 
-	mmc0_pins_uhs: mmc0@0{
+	mmc0_pins_uhs: mmc0 {
 		pins_cmd_dat {
 			pinmux = <PINMUX_GPIO123__FUNC_MSDC0_DAT0>,
 				 <PINMUX_GPIO128__FUNC_MSDC0_DAT1>,
@@ -264,7 +264,7 @@ pins_pmu {
 		};
 	};
 
-	mmc1_pins_uhs: mmc1@0{
+	mmc1_pins_uhs: mmc1 {
 		pins_cmd_dat {
 			pinmux = <PINMUX_GPIO31__FUNC_MSDC1_CMD>,
 				   <PINMUX_GPIO32__FUNC_MSDC1_DAT0>,