drm/i915/perf: remove empty line

This was added by mistake in commit 28964cf2 ("drm/i915/perf:
disable NOA logic when not used").
Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180326090831.22686-6-lionel.g.landwerlin@intel.com

drivers/gpu/drm/i915/i915_perf.c

@@ -1871,7 +1871,6 @@ static void gen8_disable_metric_set(struct drm_i915_private *dev_priv)
 
 	I915_WRITE(GDT_CHICKEN_BITS, (I915_READ(GDT_CHICKEN_BITS) &
 				      ~GT_NOA_ENABLE));
-
 }
 
 static void gen10_disable_metric_set(struct drm_i915_private *dev_priv)