ANDROID: mark DRM_VMWGFX as BROKEN

Due to many abi reverts in Android kernels, this driver is no longer
building properly and fixing it up would be pointles as it is not part
of any Android system.  So mark it as BROKEN to allow 'allmodconfig'
builds to properly continue to work.

No functional change at all for any Android users.

Bug: 161946584
Change-Id: I3b3badc26f66eb82a242e289c1d35cc54e5ed99e
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>