Staging: SLICOSS: Call pci_release_regions at driver exit

slic_entry_probe() calls pci_request_regions() but there's no matching
pci_release_regions() at driver's exit or if slic_entry_probe() fails.

Signed-off-by: Lior Dotan <liodot@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>