arm64: dts: ti: k3-am62a-mcu: enable mcu domain pinmux

Enable mcu domain pinmux by default to be able to access mcu domain
peripherals from main domain.

This also makes it consistent with the rest of the k3 platforms where
mcu domain pinmux is enabled by default.

Signed-off-by: Sai Sree Kartheek Adivi <s-adivi@ti.com>
Link: https://lore.kernel.org/r/20250120075442.181191-1-s-adivi@ti.com


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