Revert "block: make auto block plug flush threshold per-disk based"

This reverts commit 679b9a58d2e08afb7a70fa263337478e85f6c9a7.
Revert "mm: writeback: every 500ms the writeback daemon kicks in and flushes the dirty pages into disk. Thats not very pleasant for performance and *maybe* battery. This patch disables the writeback function while the screen is on, and enables it back when the screen is off to flush all the dirty pages. In my real world usage testing I notice a slight bump in smoothness and performance while using the device."

This reverts commit dfb112af721b062cfe1a2348e60d967e4094a074.
Revert "net: wireless: bcmdhd: add WiFi_PM toggle."

This reverts commit 902cd46efaf0744cba433ff7b7ea0205dc0bbed5.
I was ill