Add TI TCA9539 compatible string for yet another I2C GPIO expander.
Signed-off-by: Marek Vasut <marex@denx.de> Cc: Mario Six <mario.six@gdsys.cc> Cc: Peng Fan <van.freenix@gmail.com> Cc: Simon Glass <sjg@chromium.org> Reviewed-by: Peng Fan <peng.fan@nxp.com>