Input: synaptics-rmi4 - fix possible double free

Input: synaptics-rmi4 - fix possible double free

BugLink: https://bugs.launchpad.net/bugs/1838576
[ Upstream commit bce1a78423961fce676ac65540a31b6ffd179e6d ]

The RMI4 function structure has been released in rmi_register_function
if error occurs. However, it will be released again in the function
rmi_create_function, which may result in a double-free bug.

Signed-off-by: Pan Bian <bianpan2016@163.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Khalid Elmously <khalid.elmously@canonical.com>