dt-bindings: power: apple,pmgr-pwrstate: Add t8122 compatible

dt-bindings: power: apple,pmgr-pwrstate: Add t8122 compatible

The device power state management of the PMGR blocks on Apple's t8122
SoC (M3) is compatible with the existing driver.
Add "apple,t8122-pmgr-pwrstate" as SoC specific compatible under the
existing "apple,t8103-pmgr-pwrstate" used by the driver.

Acked-by: Rob Herring (Arm) <robh@kernel.org>
Reviewed-by: Joshua Peisach <jpeisach@ubuntu.com>
Reviewed-by: Neal Gompa <neal@gompa.dev>
Signed-off-by: Janne Grunau <j@jannau.net>
Link: https://patch.msgid.link/20260507-apple-m3-initial-devicetrees-v3-1-ca07c81b5dc7@jannau.net
Signed-off-by: Sven Peter <sven@kernel.org>