PM / Sleep: Add wakeup_source_activate and wakeup_source_deactivate tracepoints

Add tracepoints to wakeup_source_activate and
wakeup_source_deactivate.
Useful for checking that specific wakeup
sources overlap as expected.

Change-Id:
I1fa803411a11e50a4904fc97758dcbe39fa82516
Signed-off-by: Arve Hjonnevag
<arve@android.com>
Acked-by: Greg Kroah-Hartman
<gregkh@linuxfoundation.org>
Signed-off-by: Rafael J. Wysocki
<rjw@sisk.pl>
Git-commit: 6791e36
Git-repo:
git://codeaurora.org/kernel/msm.git
Signed-off-by: Anurag Singh
<anursing@codeaurora.org>

idea is taken here -
https://github.com/rmbq/android_kernel_htc_msm8960/commit/b33fb23585a3ab8808b4a7d3187ca62948996aa9