net: add reserved fields to devlink_port_region_ops

JIRA: https://issues.redhat.com/browse/RHEL-111907
Upstream Status: RHEL-only

struct devlink_port_region_ops is protected by kABI, and can be allocated by
drivers (either separately or embedded in their private context). Add
2 reserved fields.

Signed-off-by: Ivan Vecera <ivecera@redhat.com>

Author: ivecera

include/net/devlink.h

@@ -752,6 +752,9 @@ struct devlink_port_region_ops {
 		    struct netlink_ext_ack *extack,
 		    u64 offset, u32 size, u8 *data);
 	void *priv;
+
+        RH_KABI_RESERVE(1)
+        RH_KABI_RESERVE(2)
 };
 
 struct devlink_fmsg;