cpufreq: move freq change notifications to cpufreq core

Most of the drivers do following in their ->target_index() routines:

	struct cpufreq_freqs freqs;
	freqs.old = old freq...
	freqs.new = new freq...

	cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE);

	/* Change rate here */

	cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);

This is replicated over all cpufreq drivers today and there doesn't exists a
good enough reason why this shouldn't be moved to cpufreq core instead.

There are few special cases though, like exynos5440, which doesn't do everything
on the call to ->target_index() routine and call some kind of bottom halves for
doing this work, work/tasklet/etc..

They may continue doing notification from their own code as flag:
CPUFREQ_ASYNC_NOTIFICATION is already set for them.

All drivers are also modified in this patch to avoid breaking 'git bisect', as
double notification would happen otherwise.

Acked-by: Hans-Christian Egtvedt <egtvedt@samfundet.no>
Acked-by: Jesper Nilsson <jesper.nilsson@axis.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Russell King <linux@arm.linux.org.uk>
Acked-by: Stephen Warren <swarren@nvidia.com>
Tested-by: Andrew Lunn <andrew@lunn.ch>
Tested-by: Nicolas Pitre <nicolas.pitre@linaro.org>
Reviewed-by: Lan Tianyu <tianyu.lan@intel.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --cc drivers/cpufreq/acpi-cpufreq.c
Simple merge

diff --cc drivers/cpufreq/arm_big_little.c
Simple merge

diff --cc drivers/cpufreq/at32ap-cpufreq.c
Simple merge

diff --cc drivers/cpufreq/blackfin-cpufreq.c
Simple merge

diff --cc drivers/cpufreq/cpufreq-cpu0.c
Simple merge

diff --cc drivers/cpufreq/cpufreq.c
Simple merge

diff --cc drivers/cpufreq/cris-artpec3-cpufreq.c
Simple merge

diff --cc drivers/cpufreq/cris-etraxfs-cpufreq.c
Simple merge

diff --cc drivers/cpufreq/davinci-cpufreq.c
Simple merge

diff --cc drivers/cpufreq/dbx500-cpufreq.c
Simple merge

diff --cc drivers/cpufreq/e_powersaver.c
Simple merge

diff --cc drivers/cpufreq/elanfreq.c
Simple merge

diff --cc drivers/cpufreq/exynos-cpufreq.c
Simple merge

diff --cc drivers/cpufreq/ia64-acpi-cpufreq.c
Simple merge

diff --cc drivers/cpufreq/imx6q-cpufreq.c
Simple merge

diff --cc drivers/cpufreq/kirkwood-cpufreq.c
Simple merge

diff --cc drivers/cpufreq/loongson2_cpufreq.c
Simple merge

diff --cc drivers/cpufreq/maple-cpufreq.c
Simple merge

diff --cc drivers/cpufreq/omap-cpufreq.c
Simple merge

diff --cc drivers/cpufreq/p4-clockmod.c
Simple merge

diff --cc drivers/cpufreq/pasemi-cpufreq.c
Simple merge

diff --cc drivers/cpufreq/pmac32-cpufreq.c
Simple merge

diff --cc drivers/cpufreq/pmac64-cpufreq.c
Simple merge

diff --cc drivers/cpufreq/ppc-corenet-cpufreq.c
Simple merge

diff --cc drivers/cpufreq/ppc_cbe_cpufreq.c
Simple merge

diff --cc drivers/cpufreq/pxa2xx-cpufreq.c
Simple merge

diff --cc drivers/cpufreq/pxa3xx-cpufreq.c
Simple merge

diff --cc drivers/cpufreq/s3c2416-cpufreq.c
Simple merge

diff --cc drivers/cpufreq/s3c64xx-cpufreq.c
Simple merge

diff --cc drivers/cpufreq/s5pv210-cpufreq.c
Simple merge

diff --cc drivers/cpufreq/sa1100-cpufreq.c
Simple merge

diff --cc drivers/cpufreq/sa1110-cpufreq.c
Simple merge

diff --cc drivers/cpufreq/sc520_freq.c
Simple merge

diff --cc drivers/cpufreq/sparc-us2e-cpufreq.c
Simple merge

diff --cc drivers/cpufreq/sparc-us3-cpufreq.c
Simple merge

diff --cc drivers/cpufreq/spear-cpufreq.c
Simple merge

diff --cc drivers/cpufreq/speedstep-centrino.c
Simple merge

diff --cc drivers/cpufreq/speedstep-ich.c
Simple merge

diff --cc drivers/cpufreq/speedstep-smi.c
Simple merge

diff --cc drivers/cpufreq/tegra-cpufreq.c
Simple merge