clock: Add a variable with the first timestamp after startup
For measuring the startup time it's useful to save the first
timestamp after the clocksource has been registered.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
1 parent b1536a3 commit 96cae61eba199b9c3f5451f293cf60db2b535164
@Sascha Hauer Sascha Hauer authored on 30 Sep 2014
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common/clock.c
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include/clock.h