drm/panfrost: add support for reset lines
This patch implements the optional reset lines as described in the updated Midgard bindings patch at [1] and the Bifrost bindings proposal at [2].
[1] https://patchwork.freedesktop.org/patch/290177/?series=56046&rev=3 [2] https://patchwork.freedesktop.org/patch/292422/?series=53840&rev=2
Signed-off-by: Neil Armstrong narmstrong@baylibre.com