boards: teensy41: Add sdhc0 alias

Add a sdhc0 alias to the board so tests/subsys/sd/sdmmc can be build.

Signed-off-by: Fabian Blatz <fabianblatz@gmail.com>

boards/pjrc/teensy4/teensy41.dts

@@ -9,6 +9,10 @@
 / {
 	model = "PJRC TEENSY 4.1 board";
 
+	aliases {
+		sdhc0 = &usdhc1;
+	};
+
 	chosen {
 		zephyr,flash-controller = &w25q64jvxgim;
 		zephyr,flash = &w25q64jvxgim;