RDMA/Core: remove rdma_cap_read_multi_sge() helper

This functionality already exists via the max_sge_rd
device capability.
Signed-off-by: NSteve Wise <swise@opengridcomputing.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

include/rdma/ib_verbs.h

@@ -2070,34 +2070,6 @@ static inline bool rdma_cap_eth_ah(const struct ib_device *device, u8 port_num)
 	return device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_ETH_AH;
 }
 
-/**
- * rdma_cap_read_multi_sge - Check if the port of device has the capability
- * RDMA Read Multiple Scatter-Gather Entries.
- * @device: Device to check
- * @port_num: Port number to check
- *
- * iWARP has a restriction that RDMA READ requests may only have a single
- * Scatter/Gather Entry (SGE) in the work request.
- *
- * NOTE: although the linux kernel currently assumes all devices are either
- * single SGE RDMA READ devices or identical SGE maximums for RDMA READs and
- * WRITEs, according to Tom Talpey, this is not accurate.  There are some
- * devices out there that support more than a single SGE on RDMA READ
- * requests, but do not support the same number of SGEs as they do on
- * RDMA WRITE requests.  The linux kernel would need rearchitecting to
- * support these imbalanced READ/WRITE SGEs allowed devices.  So, for now,
- * suffice with either the device supports the same READ/WRITE SGEs, or
- * it only gets one READ sge.
- *
- * Return: true for any device that allows more than one SGE in RDMA READ
- * requests.
- */
-static inline bool rdma_cap_read_multi_sge(struct ib_device *device,
-					   u8 port_num)
-{
-	return !(device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_PROT_IWARP);
-}
-
 /**
  * rdma_max_mad_size - Return the max MAD size required by this RDMA Port.
  *