Revert "cardhu: net: wireless: bcmdhd: enable 5ghz support"

I've tried different firmware, etc, it seems it just doesn't support 5ghz band.

It has the BCM4330_B2 chip.

This reverts commit 10f7d32e3b09737fedb560f8d9c412e91f0e0365

Change-Id: Iabd6046320d081740cb8de211c4558349b8d8a9a
Merge "Revert "cardhu: net: wireless: bcmdhd: enable 5ghz support"" into cm-10.1