ARM: sun8i: a83t: Replace underscores with hyphens in pinmux node names

We should use hyphens and not underscores in device node names.

Replace the ones that were just added.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>

arch/arm/boot/dts/sun8i-a83t.dtsi

@@ -174,7 +174,7 @@ pio: pinctrl@1c20800 {
 			#interrupt-cells = <3>;
 			#gpio-cells = <3>;
 
-			mmc0_pins: mmc0_pins {
+			mmc0_pins: mmc0-pins {
 				pins = "PF0", "PF1", "PF2",
 				       "PF3", "PF4", "PF5";
 				function = "mmc0";
@@ -182,12 +182,12 @@ mmc0_pins: mmc0_pins {
 				bias-pull-up;
 			};
 
-			uart0_pb_pins: uart0_pb_pins {
+			uart0_pb_pins: uart0-pb-pins {
 				pins = "PB9", "PB10";
 				function = "uart0";
 			};
 
-			uart0_pf_pins: uart0_pf_pins {
+			uart0_pf_pins: uart0-pf-pins {
 				pins = "PF2", "PF4";
 				function = "uart0";
 			};