qlcnic: remove unused code

Remove function  qlcnic_enable_eswitch which was defined
but never used in current code.

Compile tested only.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --cc drivers/net/ethernet/qlogic/qlcnic/qlcnic_83xx_hw.c
Simple merge

diff --cc drivers/net/ethernet/qlogic/qlcnic/qlcnic_83xx_hw.h
Simple merge