arm64: dts: ti: k3-am62-phycore-som: Add 128MiB of global CMA

arm64: dts: ti: k3-am62-phycore-som: Add 128MiB of global CMA

Reserve 128MiB of global CMA which is also marked as re-usable
so that OS can also use the same if peripheral drivers are not using
the same.

Based on the use case described in commit c43dd2fe5316 ("arm64: dts: ti:
k3-am62x-sk-common: Reserve 128MiB of global CMA").

Signed-off-by: Wadim Egorov <w.egorov@phytec.de>
Link: https://patch.msgid.link/20260213053806.219495-1-w.egorov@phytec.de
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>