drm/qxl: Add space before open parentheses

Add space to remove checkpath.pl error:

ERROR: space required before the open parenthesis '('
Signed-off-by: Shayenne da Luz Moura <shayenneluzmoura@gmail.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1ab3ba05c140aae01bde66f73ff1f3b78bf7dfb3.1540579956.git.shayenneluzmoura@gmail.comSigned-off-by: Gerd Hoffmann <kraxel@redhat.com>

drivers/gpu/drm/qxl/qxl_display.c

@@ -940,7 +940,7 @@ static enum drm_mode_status qxl_conn_mode_valid(struct drm_connector *connector,
 	/* TODO: is this called for user defined modes? (xrandr --add-mode)
 	 * TODO: check that the mode fits in the framebuffer */
 
-	if(qdev->monitors_config_width == mode->hdisplay &&
+	if (qdev->monitors_config_width == mode->hdisplay &&
 	    qdev->monitors_config_height == mode->vdisplay)
 		return MODE_OK;