drm/i915: fix a limit check in hsw_compute_wm_results()
The '!' here was not intended. Since '!' has higher precedence than compare, it means the check is never true. This regression was introduced in commit 71fff20f Author: Ville Syrjälä <ville.syrjala@linux.intel.com> Date: Tue Aug 6 22:24:03 2013 +0300 drm/i915: Kill fbc_enable from hsw_lp_wm_results Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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