Input: edt-ft5x06 - add ft5426

As ft5426 seems to be compatible with this driver, add it.
Debug output during identification: Model "generic ft5x06 (79)", Rev. "
Signed-off-by: Andreas Kemnade <andreas@kemnade.info>
Reviewed-by: Oliver Graute <oliver.graute@kococonnector.com>
Link: https://lore.kernel.org/r/20240501204758.758537-3-andreas@kemnade.infoSigned-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/touchscreen/edt-ft5x06.c

@@ -1496,6 +1496,7 @@ static const struct of_device_id edt_ft5x06_of_match[] = {
 	{ .compatible = "edt,edt-ft5406", .data = &edt_ft5x06_data },
 	{ .compatible = "edt,edt-ft5506", .data = &edt_ft5506_data },
 	{ .compatible = "evervision,ev-ft5726", .data = &edt_ft5506_data },
+	{ .compatible = "focaltech,ft5426", .data = &edt_ft5506_data },
 	{ .compatible = "focaltech,ft5452", .data = &edt_ft5452_data },
 	/* Note focaltech vendor prefix for compatibility with ft6236.c */
 	{ .compatible = "focaltech,ft6236", .data = &edt_ft6236_data },