ARM: meson: Sync Amlogic DT from Linux 5.14

Import Amlogic DT changes from Linux commit 7d2a07b76933 ("Linux 5.14"),
dt-bindings clock changes and new meson-g12b-gsking-x.dts,
meson-sm1-bananapi-m5 & odroid-hc4 boards.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
diff --git a/arch/arm/dts/meson-gx.dtsi b/arch/arm/dts/meson-gx.dtsi
index 0edd137..6b457b2 100644
--- a/arch/arm/dts/meson-gx.dtsi
+++ b/arch/arm/dts/meson-gx.dtsi
@@ -20,6 +20,12 @@
 	#address-cells = <2>;
 	#size-cells = <2>;
 
+	aliases {
+		mmc0 = &sd_emmc_b; /* SD card */
+		mmc1 = &sd_emmc_c; /* eMMC */
+		mmc2 = &sd_emmc_a; /* SDIO */
+	};
+
 	reserved-memory {
 		#address-cells = <2>;
 		#size-cells = <2>;
@@ -295,6 +301,7 @@
 				reg = <0x0 0x84c0 0x0 0x18>;
 				interrupts = <GIC_SPI 26 IRQ_TYPE_EDGE_RISING>;
 				status = "disabled";
+				fifo-size = <128>;
 			};
 
 			uart_B: serial@84dc {