brcmfmac: support firmware reporting 160 MHz channels

brcmfmac: support firmware reporting 160 MHz channels

So far 160 MHz channels were treated as 20 MHz ones which was breaking
support for 40/80 MHz due to the brcmf_construct_chaninfo() logic and
its assumptions.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
[sw0312.kim: backport mainline commit 30519cbe339a to show more 5G channels properly]
Signed-off-by: Seung-Woo Kim <sw0312.kim@samsung.com>
Change-Id: I62ca12dfd97d0cd3233840d5b569e768dc4a1672