event/cnxk: fix base pointer for SSO head wait

event/cnxk: fix base pointer for SSO head wait

Function roc_sso_hws_head_wait() expects a base as input pointer, and it
will itself get tag_op from the base. By passing tag_op instead of base
pointer to this function will add SSOW_LF_GWS_TAG register offset twice,
which will lead to accessing wrong register.

Fixes: 1f5b3d55c041 ("event/cnxk: store and reuse workslot status")
Cc: stable@dpdk.org
Signed-off-by: Volodymyr Fialko <vfialko@marvell.com>
Acked-by: Jerin Jacob <jerinj@marvell.com>