common/sfc_efx/base: fix Rx queue without RSS hash prefix

[ upstream commit 80d18a958e4f06e121327073439c391dbc870d80 ]

If the prefix for the RSS hash was not chosen the ENOTSUP error should
be returned.

Before this patch success was returned for this case causing Rx queue
creation to fail.

Fixing return value to indicate failure.

Fixes: f784cdc ("common/sfc_efx/base: provide control to deliver RSS hash")

Signed-off-by: Artemii Morozov <artemii.morozov@arknetworks.am>
Reviewed-by: Andy Moreton <amoreton@xilinx.com>
Acked-by: Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>

drivers/common/sfc_efx/base/efx_rx.c

@@ -896,8 +896,10 @@ efx_rx_qcreate_internal(
 
 		rss_hash_field =
 		    &erplp->erpl_fields[EFX_RX_PREFIX_FIELD_RSS_HASH];
-		if (rss_hash_field->erpfi_width_bits == 0)
+		if (rss_hash_field->erpfi_width_bits == 0) {
+			rc = ENOTSUP;
 			goto fail5;
+		}
 	}
 
 	enp->en_rx_qcount++;