arm64: dts: ti: k3-am69-sk: Add eMMC mmc0 support

Add support for eMMC card connected to main sdhci0 instance.
Signed-off-by: Dasnavis Sabiya <sabiya.d@ti.com>
Reviewed-by: Nishanth Menon <nm@ti.com>
Link: https://lore.kernel.org/r/20230605174551.160262-1-sabiya.d@ti.comSigned-off-by: Vignesh Raghavendra <vigneshr@ti.com>

arch/arm64/boot/dts/ti/k3-am69-sk.dts

@@ -22,6 +22,7 @@ chosen {
 
 	aliases {
 		serial2 = &main_uart8;
+		mmc0 = &main_sdhci0;
 		mmc1 = &main_sdhci1;
 		i2c0 = &main_i2c0;
 	};
@@ -165,6 +166,14 @@ exp1: gpio@21 {
 	};
 };
 
+&main_sdhci0 {
+	/* eMMC */
+	status = "okay";
+	non-removable;
+	ti,driver-strength-ohm = <50>;
+	disable-wp;
+};
+
 &main_sdhci1 {
 	/* SD card */
 	status = "okay";