MALI: Fix userpointer access

Some code in the mali driver was accessing user pointers
directly instead using the reference that has been copied
already.

This changes the access to use the already copied over
reference.

Change-Id: Iff5f2adb54b005c2fdd3c3f79680731a2d9627f1
Signed-off-by: John Stultz <john.stultz@linaro.org>
1 file changed