drm_hwcomposer: Convert src_x,src_y to 16.16 fixed

We convert src_w,src_h, but failed to convert src_x.src_y. This
has the effect of never indexing into fb's properly.

Bug: chrome-os-parter:42311
Test: On smaug, open up the add google account screen, it should
      not be shifted

Change-Id: Ic5cf654d93ea6c89c2cbd23c1d847fbc412a7d19
Signed-off-by: Sean Paul <seanpaul@chromium.org>
1 file changed