brcm: add firmware for BCM4354 2x2 11ac SDIO device

This patch adds the firmware for the BCM4354 2x2 11ac chipset
using SDIO host interface.
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

WHENCE

@@ -1738,6 +1738,7 @@ File: brcm/brcmfmac43241b0-sdio.bin
 File: brcm/brcmfmac43241b4-sdio.bin
 File: brcm/brcmfmac43143.bin
 File: brcm/brcmfmac43143-sdio.bin
+File: brcm/brcmfmac4354-sdio.bin
 
 Licence: Redistributable. See LICENCE.broadcom_bcm43xx for details.