drm/i915/icl: Drop redundant gamma mode mask
gamma mode mask was not considering the 30th and 31st bits. Due to this state readout was masking these bits, causing a mismatch and false warning, even though the registers were updated correctly. Dropped the gamma mode mask as it is redundant and ideally entire register content should be matching. This resolves the state mismatch warnings. Signed-off-by: Uma Shankar <uma.shankar@intel.com> Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/1550689519-6977-1-git-send-email-uma.shankar@intel.com Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=109624
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