minigbm: i915: align to page size always

Upstream commit 2e7bd10e05af ("drm/i915: Prevent a race during
I915_GEM_MMAP ioctl with WC set") started checking this apparently.

BUG=b:126609463
TEST=gbmtest on octopus

Change-Id: Idfcef40b2c49c8ec6a8c18351d7da7d0edeaea1f
Reviewed-on: https://chromium-review.googlesource.com/1495920
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Tested-by: Guenter Roeck <groeck@chromium.org>
Reviewed-by: Guenter Roeck <groeck@chromium.org>
1 file changed