[EXT] [PATCH net 1/1] net: stmmac: fix incorrect flag check in timestamp interrupt

[Suman Ghosh]

>----------------------------------------------------------------------
>The driver should continue get the timestamp if
>STMMAC_FLAG_EXT_SNAPSHOT_EN flag is set.
>
[Suman] Hi Lai,
Please ad the "fixes" tag

>Signed-off-by: Song Yoong Siang <yoong.siang.song at intel.com>
>Signed-off-by: Lai Peter Jun Ann <jun.ann.lai at intel.com>