drm/i915: Fix 90/270 rotated coordinates for FBC

drm/i915: Fix 90/270 rotated coordinates for FBC

The clipped src coordinates have already been rotated by 270 degrees for
when the plane rotation is 90/270 degrees, hence the FBC code should no
longer swap the width and height.

Cc: [email protected]
Cc: Tvrtko Ursulin <[email protected]>
Cc: Paulo Zanoni <[email protected]>
Fixes: b63a16f6cd89 ("drm/i915: Compute display surface offset in the plane check hook for SKL+")
Signed-off-by: Ville Syrjälä <[email protected]>
Link: http://patchwork.freedesktop.org/patch/msgid/[email protected]
Reviewed-by: Paulo Zanoni <[email protected]>
Tested-by: Tvrtko Ursulin <[email protected]>
Reviewed-by: Maarten Lankhorst <[email protected]>