ixgbe: Fix incorrect logic for fixed fiber eeprom write

In this code we wanted to set the bit in IXGBE_SFF_SOFT_RS_SELECT_MASK to
the value in rs.  So we really needed a logical or rather than an and, this
patch makes that change.

Signed-off-by: Don Skidmore <donald.c.skidmore@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>