This patch adds a note on defining subdomains to generic PM domain
binding documentation to let power domain providers use common approach
for defining power domain hierarchy.
Signed-off-by: NMarek Szyprowski <m.szyprowski@samsung.com>
Acked-by: NGeert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: NUlf Hansson <ulf.hansson@linaro.org>
Signed-off-by: NKukjin Kim <kgene@kernel.org>