dt-bindings: power: apple,pmgr-pwrstate: Add t8112 compatible

Add the apple,t8112-pmgr-pwrstate compatible for the Apple M2 SoC.

This goes after t8103. The sort order logic here is having SoC numeric
code families in release order, and SoCs within each family in release
order:

- t8xxx (Apple HxxP/G series, "phone"/"tablet" chips)
  - t8103 (Apple H13G/M1)
  - t8112 (Apple H14G/M2)
- t6xxx (Apple HxxJ series, "desktop" chips)
  - t6000 (Apple H13J(S)/M1 Pro)
  - t6001 (Apple H13J(C)/M1 Max)
  - t6002 (Apple H13J(D)/M1 Ultra)

Note that t600[0-2] share the t6000 compatible where the hardware is
100% compatible, which is usually the case in this highly related set
of SoCs.

Reviewed-by: Janne Grunau <j@jannau.net>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Janne Grunau <j@jannau.net>
Signed-off-by: Hector Martin <marcan@marcan.st>