uio/uio_pci_generic: remove unneeded pci_set_drvdata()

uio/uio_pci_generic: remove unneeded pci_set_drvdata()

The pci_get_drvdata() was moved during commit ef84928cff58
("uio/uio_pci_generic: use device-managed function equivalents").

Storing a private object with pci_set_drvdata() doesn't make sense
since that change, since there is no more pci_get_drvdata() call in the
driver to retrieve the information.

This change removes it.

Fixes: ef84928cff58 ("uio/uio_pci_generic: use device-managed function equivalents")
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Link: https://lore.kernel.org/r/20201123143447.16829-1-alexandru.ardelean@analog.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>