WLAN (SDIO) firmware version: 15.68.4.p22
Bluetooth (SDIO) firmware version: 15.28.4.p22

The combo image can be downloaded through either WLAN or Bluetooth.
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: Frank Huang <frankh@marvell.com>