drm/i915: Nuke the bogus kernel doc for i9xx_disable_pll()

Signed-off-by: NVille Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20170913140900.6972-6-ville.syrjala@linux.intel.comReviewed-by: NChris Wilson <chris@chris-wilson.co.uk>

drivers/gpu/drm/i915/intel_display.c

@@ -1628,15 +1628,6 @@ static void i9xx_enable_pll(struct intel_crtc *crtc,
 	}
 }
 
-/**
- * i9xx_disable_pll - disable a PLL
- * @dev_priv: i915 private structure
- * @pipe: pipe PLL to disable
- *
- * Disable the PLL for @pipe, making sure the pipe is off first.
- *
- * Note!  This is for pre-ILK only.
- */
 static void i9xx_disable_pll(struct intel_crtc *crtc)
 {
 	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);