uio: uio_aec: use devm_kzalloc() for uio_info object

The uio_info object is free'd last, so it's life-time is tied PCI device
object. Using devm_kzalloc() cleans up the error path a bit and the exit
path.

Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Link: https://lore.kernel.org/r/20201119154903.82099-2-alexandru.ardelean@analog.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>