RDMA/bnxt_re: make bnxt_re_ib_init static

Fix sparse warning:

drivers/infiniband/hw/bnxt_re/main.c:1313:5:
 warning: symbol 'bnxt_re_ib_init' was not declared. Should it be static?

Link: https://lore.kernel.org/r/20200330110219.24448-1-yuehaibing@huawei.com


Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Acked-by: Selvin Xavier <selvin.xavier@broadcom.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>