drm/panel-edp: Fix typo in kerneldoc comment (appers=>appears)

Ever since I got the spell-check working in my editor this one has
been bugging me. Fix it.
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20220720162314.1.Ieef5bc3848df40b71605b70bb571d6429e8978de@changeid

drivers/gpu/drm/panel/panel-edp.c

@@ -53,7 +53,7 @@ struct panel_delay {
 	 * before the HPD signal is reliable. Ideally this is 0 but some panels,
 	 * board designs, or bad pulldown configs can cause a glitch here.
 	 *
-	 * NOTE: on some old panel data this number appers to be much too big.
+	 * NOTE: on some old panel data this number appears to be much too big.
 	 * Presumably some old panels simply didn't have HPD hooked up and put
 	 * the hpd_absent here because this field predates the
 	 * hpd_absent. While that works, it's non-ideal.