qla2xxx: Remove unused reverse_ini_mode

With support for dual mode in the driver, this mode becomes
dead code. Remove reverse_ini_mode from code.

Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>