arm64: dts: mediatek: mt8173: Fix pinctrl node names and cleanup

Fix the pinctrl node names to adhere to the bindings, as the main
pin node is supposed to be named like "uart0-pins" and the pinmux
node named like "pins-bus".

While at it, also cleanup all of the MTK_DRIVE_(x)mA by changing
that to just the (x) number.

Reviewed-by: Chen-Yu Tsai <wenst@chromium.org>
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>

Author: AngeloGioacchino Del Regno

arch/arm64/boot/dts/mediatek/mt8173-elm-hana.dtsi

@@ -5,6 +5,14 @@
 
 #include "mt8173-elm.dtsi"
 
+&hdmi_mux_pins {
+	pins-mux {
+		pinmux = <MT8173_PIN_98_URTS1__FUNC_GPIO98>;
+		bias-pull-up;
+		output-high;
+	};
+};
+
 &i2c0 {
 	clock-frequency = <200000>;
 };
@@ -67,26 +75,16 @@
 	};
 };
 
-&mmc1 {
-	wp-gpios = <&pio 42 GPIO_ACTIVE_HIGH>;
-};
-
-&pio {
-	hdmi_mux_pins: hdmi_mux_pins {
-		pins2 {
-			pinmux = <MT8173_PIN_98_URTS1__FUNC_GPIO98>;
-			bias-pull-up;
-			output-high;
-		};
+&mmc1_pins_default {
+	pins-wp {
+		pinmux = <MT8173_PIN_42_DSI_TE__FUNC_GPIO42>;
+		input-enable;
+		bias-pull-up;
 	};
+};
 
-	mmc1_pins_default: mmc1default {
-		pins_wp {
-			pinmux = <MT8173_PIN_42_DSI_TE__FUNC_GPIO42>;
-			input-enable;
-			bias-pull-up;
-		};
-	};
+&mmc1 {
+	wp-gpios = <&pio 42 GPIO_ACTIVE_HIGH>;
 };
 
 &touchscreen {