ata: pata_cs5520: Remove unnecessary call to pci_enable_device_io()

A few lines earlier pcim_enable_device() is called, which includes the
functionality of pci_enable_device_io(). Therefore we can safely remove the
call to pci_enable_device_io().

Link: https://lore.kernel.org/r/5068d0ce-2140-4d3f-b305-e8f0d61eed1f@gmail.com
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Acked-by: Damien Le Moal <dlemoal@kernel.org>