scsi: qla2xxx: Make qla_set_ini_mode() return void

scsi: qla2xxx: Make qla_set_ini_mode() return void

The return value is not used by the caller and the local variable 'rc' is
not needed. Make qla_set_ini_mode() return void and remove 'rc'.  This also
fixes the following coccicheck warning:

drivers/scsi/qla2xxx/qla_attr.c:1906:5-7: Unneeded variable: "rc".
Return "0" on line 2180

Link: https://lore.kernel.org/r/20200429140952.8240-1-yanaijie@huawei.com
Signed-off-by: Jason Yan <yanaijie@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>