Current dts files with 'grf' nodes are manually verified.
In order to automate this process grf.txt has to be
converted to YAML.

Most compatibility strings are in use with "simple-mfd" added.

Changed compatibles:
"rockchip,rk3066-grf", "syscon", "simple-mfd"
"rockchip,rk3188-grf", "syscon", "simple-mfd"

Add description already in use:
"rockchip,rv1108-pmugrf", "syscon"

Add new descriptions for:
"rockchip,rk3568-grf", "syscon", "simple-mfd"
"rockchip,rk3568-pmugrf", "syscon", "simple-mfd"
Signed-off-by: Johan Jonker <jbx6244@gmail.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20210512122346.9463-3-jbx6244@gmail.comSigned-off-by: Heiko Stuebner <heiko@sntech.de>