drm/lima: Fix lima cache creation
Due to the kernel merge of the hardened usercopy patch set we have to whitelist the memory area which is used for copy_from_user actions. Otherwise lima fails with an abort and segmentation fault.
This is necessary on systems with CONFIG_HARDENED_USERCOPY enabled. It was tested on a Cubieboard 1, Allwinner A10.
Signed-off-by: Andreas Baierl ichgeh@imkreisrum.de