reset: th1520: Support reset controllers in more subsystems

Introduce reset controllers for AP, MISC, VI, VP and DSP subsystems and
add their reset signal mappings.

Signed-off-by: Yao Zi <ziyao@disroot.org>
Reviewed-by: Drew Fustini <fustini@kernel.org>
Acked-by: Guo Ren <guoren@kernel.org>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>

Author: ziyao233