Revert "ARM: add cpufreq transiton notifier to adjust loops_per_jiffy for smp"

This reverts commit 05a04eb5ec76842632f145d6e9aec9a592b52545.
block: Expose kblock_schedule_delayed_work()

This function is exported in blk-core.c to be used in other modules
but it's definition in h file is missing.

Signed-off-by: Tatyana Brokhman <tlinder@codeaurora.org>