ARM64: dts: meson-axg: add pdm pins

Add pdm input pin definitions to meson AXG

Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>

arch/arm64/boot/dts/amlogic/meson-axg.dtsi

@@ -477,6 +477,48 @@ mux {
 					};
 				};
 
+				pdm_dclk_a14_pins: pdm_dclk_a14 {
+					mux {
+						groups = "pdm_dclk_a14";
+						function = "pdm";
+					};
+				};
+
+				pdm_dclk_a19_pins: pdm_dclk_a19 {
+					mux {
+						groups = "pdm_dclk_a19";
+						function = "pdm";
+					};
+				};
+
+				pdm_din0_pins: pdm_din0 {
+					mux {
+						groups = "pdm_din0";
+						function = "pdm";
+					};
+				};
+
+				pdm_din1_pins: pdm_din1 {
+					mux {
+						groups = "pdm_din1";
+						function = "pdm";
+					};
+				};
+
+				pdm_din2_pins: pdm_din2 {
+					mux {
+						groups = "pdm_din2";
+						function = "pdm";
+					};
+				};
+
+				pdm_din3_pins: pdm_din3 {
+					mux {
+						groups = "pdm_din3";
+						function = "pdm";
+					};
+				};
+
 				pwm_a_a_pins: pwm_a_a {
 					mux {
 						groups = "pwm_a_a";