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 <kever.yang@rock-chips.com>
Tested-by: Loic Devulder <ldevulder@suse.com>
Tested-by: Peter Geis <pgwipeout@gmail.com>
Signed-off-by: Chen-Yu Tsai <wens@csie.org>