arm64: dts: ti: k3-am64-tqma64xxl-mbax4xxl: update gpio-led configuration

Replace the deprecated label property with color/function.

Signed-off-by: Matthias Schiffer <matthias.schiffer@ew.tq-group.com>
Link: https://lore.kernel.org/r/79cb3cdfed19962ce0d4ae558de897695658a81f.1695901360.git.matthias.schiffer@ew.tq-group.com


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