net/bnxt: fix flow check for null spec and mask

net/bnxt: fix flow check for null spec and mask

bnxt_validate_and_parse_flow_type already has protocol specific NULL
checks for rte_flow_item spec and mask and take actions accordingly.
A check at the top of the loop is redundant and is preventing the
protocol specific checks from being executed.

Fixes: b7e01f386059 ("net/bnxt: handle cleanup if flow creation fails")

Signed-off-by: Ajit Khaparde <ajit.khaparde@broadcom.com>
Reviewed-by: Santoshkumar Karanappa Rastapur <santosh.rastapur@broadcom.com>
Reviewed-by: Somnath Kotur <somnath.kotur@broadcom.com>