drm/i915/display: Fix a typo

s/nothign/nothing/
Signed-off-by: NBhaskar Chowdhury <unixbhaskar@gmail.com>
Signed-off-by: NJani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210319043701.14105-1-unixbhaskar@gmail.com

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

@@ -4199,7 +4199,7 @@ static void icl_pll_disable(struct drm_i915_private *dev_priv,
 	/*
 	 * DVFS pre sequence would be here, but in our driver the cdclk code
 	 * paths should already be setting the appropriate voltage, hence we do
-	 * nothign here.
+	 * nothing here.
 	 */
 
 	val = intel_de_read(dev_priv, enable_reg);