drm/i915: Fix intel_tile_width() parameters

The fb_modifiers and cpp arguments passed to intel_tile_width() in
intel_fill_fb_ggtt_view() got accidentally swapped around. I'm pretty
sure I fixed this already, but could be I lost the fix accidentally
during some rebases or something. Anyway, fix it up for real.

Fixes: d9b3288e

 ("drm/i915: change intel_fill_fb_ggtt_view() to use the real tile size")
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1453316739-13296-8-git-send-email-ville.syrjala@linux.intel.com
Testcase: igt/kms_rotation_crc/primary-rotation-90
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: drm-intel-fixes@lists.freedesktop.org