ARM: dts: sunxi: h3/h5: Add r_i2c pinmux node

H3/H5 SoCs contain an I2C controller optionally available
on the PL0 and PL1 pins. This patch adds pinmux configuration
for this controller.
Signed-off-by: Ondrej Jirman <megous@megous.com>
[Icenowy: change commit message, node name and function name]
Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
Reviewed-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Chen-Yu Tsai <wens@csie.org>

arch/arm/boot/dts/sunxi-h3-h5.dtsi

@@ -837,6 +837,11 @@ ir_pins_a: ir {
 				pins = "PL11";
 				function = "s_cir_rx";
 			};
+
+			r_i2c_pins: r-i2c {
+				pins = "PL0", "PL1";
+				function = "s_i2c";
+			};
 		};
 	};
 };