Revert "bcmdhd: Import from Google AOSP hammerhead (Nexus 5) kernel"

Breaks WiFi hotspot and causes other WiFi issues for some.

This reverts commit 299f7e4b544b5940d09cb22184ffb2d25c0b15b1.
Revert "net: wireless: Backport from Google AOSP hammerhead (Nexus 5) kernel"

This reverts commit 5cb5b660c64e862f7cbbb69ced607b42631917d1.
Sultan_defconfig: Refresh
Sultan_defconfig: v1.4.1