Revert "nl80211: support vendor-specific events"

This reverts commit d950549504d4302846d80b66a000b91a9eae50af.

Conflicts:
	net/wireless/nl80211.c

Change-Id: If453c1db07abb5e18983b19222b78bd683571e48
Switch to native caf wireless

Also in this commit:

Revert "nl80211: vendor command support"

This reverts commit b784fbe8d030a5204126e56727ee63144e16e50b.

Conflicts:
	net/wireless/nl80211.c

Change-Id: Iac851b22d0b99d2d99a123c4d083ef1b7b172faa