qed: initialize ll2_syn_handle at start of function

Fix compilation warning
qed_iwarp.c:1721:5: warning: ll2_syn_handle may be used
uninitialized in this function

Signed-off-by: Michal Kalderon <Michal.Kalderon@cavium.com>
Signed-off-by: Ariel Elior <Ariel.Elior@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>