cxl/feature: Remove redundant code of get supported features

JIRA: https://issues.redhat.com/browse/RHEL-107284

commit 6eed708
Author: Li Ming <ming.li@zohomail.com>
Date:   Fri May 16 22:32:20 2025 +0800

    cxl/feature: Remove redundant code of get supported features

    In cxlctl_get_supported_features(), there is a code block that handles
    the case where the requested is equal to 0. But the code following the
    code block can also handle this situation. So the code block is not
    needed.

    Signed-off-by: Li Ming <ming.li@zohomail.com>
    Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
    Reviewed-by: Dave Jiang <dave.jiang@intel.com>
    Link: https://patch.msgid.link/20250516143220.35302-1-ming.li@zohomail.com
    Signed-off-by: Dave Jiang <dave.jiang@intel.com>

Signed-off-by: John W. Linville <linville@redhat.com>

Author: John W. Linville

drivers/cxl/core/features.c

@@ -426,14 +426,6 @@ static void *cxlctl_get_supported_features(struct cxl_features_state *cxlfs,
 
 	rpc_out->size = struct_size(feat_out, ents, requested);
 	feat_out = &rpc_out->get_sup_feats_out;
-	if (requested == 0) {
-		feat_out->num_entries = cpu_to_le16(requested);
-		feat_out->supported_feats =
-			cpu_to_le16(cxlfs->entries->num_features);
-		rpc_out->retval = CXL_MBOX_CMD_RC_SUCCESS;
-		*out_len = out_size;
-		return no_free_ptr(rpc_out);
-	}
 
 	for (i = start, pos = &feat_out->ents[0];
 	     i < cxlfs->entries->num_features; i++, pos++) {