Spacemit's PMIC is used by Spacemit K1 SoC. It contains voltage regulators, GPIOs and Watchdog. Signed-off-by: Raymond Mao <raymond.mao@riscstar.com> Signed-off-by: Guodong Xu <guodong@riscstar.com> Acked-by: Peng Fan <peng.fan@nxp.com> Tested-by: Songsong Zhang <sszhang@vsit.ai>