bnxt_en: Remove the redundant BNXT_EN_FLAG_MSIX_REQUESTED flag

bnxt_en: Remove the redundant BNXT_EN_FLAG_MSIX_REQUESTED flag

MSIX is always requested when the RoCE driver calls bnxt_register_dev().
We already check bnxt_ulp_registered(), so checking the flag is
redundant.  It was a left-over flag after converting to auxbus, so
remove it.

Reviewed-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
Reviewed-by: Somnath Kotur <somnath.kotur@broadcom.com>
Signed-off-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Link: https://patch.msgid.link/20251126215648.1885936-4-michael.chan@broadcom.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>