arm64: dts: ti: k3-am62-verdin: Fix SD regulator startup delay

The power switch used to power the SD card interface might have
more than 2ms turn-on time, increase the startup delay to 20ms to
prevent failures.

Fixes: 316b8024 ("arm64: dts: ti: add verdin am62")
Cc: stable@vger.kernel.org
Signed-off-by: Francesco Dolcini <francesco.dolcini@toradex.com>
Link: https://lore.kernel.org/r/20241024130628.49650-1-francesco@dolcini.it


Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>