artik055: add wifi fw for artik055s (DATE20170915)
artik055: add wifi fw for artik055s (DATE20170915)

To improve the WLAN performance of the ARTIK055S, a new WLAN binary was
created. If you are using ARTIK055S, we recommend using this binary.

Change-Id: Ia2e79785276b6c885bf160c6ec1339ccb65df215
Signed-off-by: Junhwan Park <7fee488b6f78fc50b291ffc7d10428788977e877@samsung.com>

JunhwanPark/TizenRT,JunhwanPark/TizenRT,JunhwanPark/TizenRT,JunhwanPark/TizenRT,JunhwanPark/TizenRT,JunhwanPark/TizenRT