e1000e: do not error out on identification LED init failure

A failure to initialize the identification LED is not a fatal condition and
should allow the init path to continue.

Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>