drm/etnaviv: update hardware headers from rnndb

Update the state HI and common header from rnndb commit
8478eef32fd9 (rnndb: document secure GPU reset bit).

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>

drm/etnaviv: update common.xml.h

Update the common hardware header with new information
from rnndb.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>

drm/etnaviv: update common and state_hi xml.h files

Update the common and state_hi xml.h header files from the etnaviv
repository.

Acked-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>

drm/etnaviv: add initial etnaviv DRM driver

This adds the etnaviv DRM driver and hooks it up in Makefiles
and Kconfig.

Signed-off-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>