As we defined the new hwtstamp_config flag HWTSTAMP_FLAG_BONDED_PHC_INDEX
as enum, it's not easy for userspace program to check if the flag is
supported when build.

Let's define the new flag so user space could build it on old kernel with
ifdef check.

Fixes: 9c9211a3fc7a ("net_tstamp: add new flag HWTSTAMP_FLAG_BONDED_PHC_INDEX")
Signed-off-by: Hangbin Liu <redacted>
---
 include/uapi/linux/net_tstamp.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/uapi/linux/net_tstamp.h b/include/uapi/linux/net_tstamp.h
index e258e52cfd1f..55501e5e7ac8 100644
--- a/include/uapi/linux/net_tstamp.h
+++ b/include/uapi/linux/net_tstamp.h

@@ -87,6 +87,7 @@ enum hwtstamp_flags {
 	 * will be the PHC index.
 	 */
 	HWTSTAMP_FLAG_BONDED_PHC_INDEX = (1<<0),
+#define HWTSTAMP_FLAG_BONDED_PHC_INDEX	HWTSTAMP_FLAG_BONDED_PHC_INDEX
 
 	HWTSTAMP_FLAG_LAST = HWTSTAMP_FLAG_BONDED_PHC_INDEX,
 	HWTSTAMP_FLAG_MASK = (HWTSTAMP_FLAG_LAST - 1) | HWTSTAMP_FLAG_LAST

-- 
2.31.1