rockchip: rk3066: add grf header file

grf is needed by various drivers for rk3066 soc.

Change-Id: Id605feb6491eab73c2db9a0acba6e096e519e4ba
Signed-off-by: Paweł Jarosz <paweljarosz3691@gmail.com>
A

rockchip: rk3066: add grf header file

grf is needed by various drivers for rk3066 soc.

Change-Id: Id605feb6491eab73c2db9a0acba6e096e519e4ba
Signed-off-by: Paweł Jarosz <paweljarosz3691@gmail.com>
Acked-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Signed-off-by: Kever Yang <kever.yang@rock-chips.com>

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