gxp: Add a static debug pointer to driver state

To assist with debugging of ramdumps where the GXP driver is not in the
backstack, add a static symbol containing a pointer to the driver state
so it can be located quickly in memory.

Bug: 255451381
Signed-off-by: John Scheible <johnscheible@google.com>
Change-Id: Ie68196f2642e839932dee0c3a972f17f563e2764
1 file changed