Add firmware image update support for gen5 trackpad device, it can be used
through sysfs update_fw interface.
Signed-off-by: NDudley Du <dudl@cypress.com>
Tested-by: NJeremiah Mahler <jmmahler@gmail.com>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>