Revert "net: wireless: bcmdhd: Reduce scan dwell time to reduce power"

This reverts commit 8cb2c0de76fa6fa28b4b39dc6e2c71beabf21903.
Revert "bcmdhd: add dev_priv struct required by previous commit"

This reverts commit 57099c47a9395ebfa3c6ecd61ca07744e911138f.
Revert "net: wireless: bcmdhd: Reduce scan dwell time only in power-save mode"

This reverts commit 963f844f91b0a8a921f85f35bbc50e93dcacf581.

Conflicts:
	drivers/net/wireless/bcmdhd/Makefile