drm/panel: novatek-nt35950: remove unneeded semicolon

Eliminate the following coccicheck warning:
./drivers/gpu/drm/panel/panel-novatek-nt35950.c:639:2-3: Unneeded
semicolon

Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Fixes: 623a3531 ("drm/panel: Add driver for Novatek NT35950 DSI DriverIC panels")
Signed-off-by: Yang Li <yang.lee@linux.alibaba.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/1634629046-116842-1-git-send-email-yang.lee@linux.alibaba.com