Revert "ibmvnic: check failover_pending in login response"

This reverts commit d437f5aa.

Code has been duplicated through commit <273c29e9> "ibmvnic: check
failover_pending in login response"

Signed-off-by: Desnes A. Nunes do Rosario <desnesn@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>