RDMA/bnxt_re: Fix the compatibility flag for variable size WQE

For older adapters that doesn't support variable size WQE,
driver is wrongly reporting that variable WQE is supported,
when the latest library is used.

Report the variable WQE capability only if the driver supports
it.

Fixes: 10a104c ("RDMA/bnxt_re: Enable variable size WQEs for user space applications")
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Link: https://patch.msgid.link/1725444253-13221-2-git-send-email-selvin.xavier@broadcom.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>

drivers/infiniband/hw/bnxt_re/ib_verbs.c

@@ -4272,7 +4272,8 @@ int bnxt_re_alloc_ucontext(struct ib_ucontext *ctx, struct ib_udata *udata)
 		if (ureq.comp_mask & BNXT_RE_COMP_MASK_REQ_UCNTX_VAR_WQE_SUPPORT) {
 			resp.comp_mask |= BNXT_RE_UCNTX_CMASK_HAVE_MODE;
 			resp.mode = rdev->chip_ctx->modes.wqe_mode;
-			uctx->cmask |= BNXT_RE_UCNTX_CAP_VAR_WQE_ENABLED;
+			if (resp.mode == BNXT_QPLIB_WQE_MODE_VARIABLE)
+				uctx->cmask |= BNXT_RE_UCNTX_CAP_VAR_WQE_ENABLED;
 		}
 	}