staging: vt6655: device_get_pci_info remove call to set master.

a call to PCI_COMMAND is used to set master.

However, a call to pci_set_master earlier in function which
does the same thing.

So remove the calls and variable b.

Signed-off-by: Malcolm Priestley <tvboxspy@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>