octeontx2-af: make PF_FUNC comparison consistent in NIX XOFF handling

octeontx2-af: make PF_FUNC comparison consistent in NIX XOFF handling

nix_smq_flush_enadis_xoff() compares PF_FUNC values with the FUNC bits
masked off, but one operand applied the mask before extracting PF_FUNC
via TXSCH_MAP_FUNC().

Apply RVU_PFVF_FUNC_MASK after TXSCH_MAP_FUNC() for the TL2 scheduler
queue operand, matching the existing handling of the other operand and
making the comparison consistent and clearer.

No functional change intended.

Signed-off-by: Alok Tiwari <alok.a.tiwari@oracle.com>
Reviewed-by: Subbaraya Sundeep <sbhatta@marvell.com>
Link: https://patch.msgid.link/20260304193950.2467391-1-alok.a.tiwari@oracle.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>