Revert "msm: cpufreq: Remove deprecated APIs"

This reverts commit ef687a292db240753563d50b1eb28a192d4e9573.
kthread_work: wake up worker only when the worker is idle

If the worker is already executing a work item when another is queued,
we can safely skip wakeup without worrying about stalling queue thus
avoiding waking up the busy worker spuriously.  Spurious wakeups
should be fine but still isn't nice and avoiding it is trivial here.

tj: Updated description.

Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>
ARM: dts: hammerhead: Change i2c clock rate to 19.2 MHz

* Referenced CAF:
  https://www.codeaurora.org/cgit/quic/la/kernel/msm/commit/arch/arm/boot/dts/msm8974.dtsi?h=kk_3.5&id=2762366bdeb1d2d3bb43ffb21ad3a0908d51551e

Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>
msm: Restore MultiROM black magic value

* This was changed recently due to memory related
  updates and relocation of memories.
* However, this is a magic value which need not to
  be touched.
* This fixes broken multiROM.

Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>