brcmfmac: feature check for multi-scheduled scan fails on bcm4345 devices

The firmware feature check introduced for multi-scheduled scan is also
failing for bcm4345 devices resulting in a firmware crash.
The reason for this crash has not yet been root cause so this patch avoids
the feature check for those device as a short-term fix.

Fixes: 9fe929aa ("brcmfmac: add firmware feature detection for gscan feature")
Cc: <stable@vger.kernel.org> # v4.13
Signed-off-by: Ian W MORRISON <ianwmorrison@gmail.com>
Acked-by: Arend van Spriel <arend.vanspriel@broadcom.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>