dt-bindings: power: rk3328-power: sync from upstream Linux kernel

dt-bindings: power: rk3328-power: sync from upstream Linux kernel

This syncs the rk3328 power domain header file from Linux kernel
next-20200324, to support newer hardware blocks when syncing the
device tree files.

The last non-merge commit to touch it was

    b24413180f56 ("License cleanup: add SPDX GPL-2.0 license identifier to files with no license")

Reviewed-by: Kever Yang <[email protected]>
Tested-by: Loic Devulder <[email protected]>
Tested-by: Peter Geis <[email protected]>
Signed-off-by: Chen-Yu Tsai <[email protected]>