arm64: dts: apple: t8103: Add ps_pmp dependency to ps_gfx

arm64: dts: apple: t8103: Add ps_pmp dependency to ps_gfx

AGX appears to have a hidden communication channel to pmp, a power
management related co-processor already brought up by Apple's
bootloader. As there is not driver for this co-processor its
power-domain gets shut down after the initial boot.
This crashes the firmware running on AGX immediately.
Until there is a pmp driver and the dependency between AGX and pmp is
understood keep "ps_pmp" as dependency of "ps_gfx".

Signed-off-by: Janne Grunau <j@jannau.net>
Link: https://patch.msgid.link/20260108-apple-dt-pmgr-fixes-v1-3-cfdce629c0a8@jannau.net
Signed-off-by: Sven Peter <sven@kernel.org>