ARM: dts: meson8: add the PWM_E and PWM_F pins

This adds the definition of the PWM_E (CBUS) and PWM_F (AOBUS) to
meson8.dtsi, allowing devices to use them. PWM_E can be used on some
devices to generate the 32.768kHz clock for the SDIO wifi module, while
PWM_F can be used to control the power LED.
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>

arch/arm/boot/dts/meson8.dtsi

@@ -123,6 +123,13 @@ mux {
 				function = "remote";
 			};
 		};
+
+		pwm_f_ao_pins: pwm-f-ao {
+			mux {
+				groups = "pwm_f_ao";
+				function = "pwm_f_ao";
+			};
+		};
 	};
 };
 
@@ -168,6 +175,13 @@ mux {
 				function = "ethernet";
 			};
 		};
+
+		pwm_e_pins: pwm-e {
+			mux {
+				groups = "pwm_e";
+				function = "pwm_e";
+			};
+		};
 	};
 };