arm64: dts: ti: k3-am625-sk: Enable ramoops

Enable ramoops features to easily debug some issues.

Signed-off-by: Guillaume La Roque <glaroque@baylibre.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Link: https://lore.kernel.org/r/20220517122828.2985179-1-glaroque@baylibre.com