drm/i915/display: Unkerneldoc cnl_program_nearest_filter_coefs

The block comment for cnl_program_nearest_filter_coefs() has a wonderful
diagram, but although it is marked up as kerneldoc does not use the
markup for providing the function definition.

drivers/gpu/drm/i915/display/intel_display.c:6341: warning: Function parameter or member 'dev_priv' not described in 'cnl_program_nearest_filter_coefs'
drivers/gpu/drm/i915/display/intel_display.c:6341: warning: Function parameter or member 'pipe' not described in 'cnl_program_nearest_filter_coefs'
drivers/gpu/drm/i915/display/intel_display.c:6341: warning: Function parameter or member 'id' not described in 'cnl_program_nearest_filter_coefs'
drivers/gpu/drm/i915/display/intel_display.c:6341: warning: Function parameter or member 'set' not described in 'cnl_program_nearest_filter_coefs'
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201021185649.17759-1-chris@chris-wilson.co.uk

drivers/gpu/drm/i915/display/intel_display.c

@@ -6299,7 +6299,7 @@ static u16 cnl_nearest_filter_coef(int t)
 	return t == 3 ? 0x0800 : 0x3000;
 }
 
-/**
+/*
  *  Theory behind setting nearest-neighbor integer scaling:
  *
  *  17 phase of 7 taps requires 119 coefficients in 60 dwords per set.