While converting the init function to return an error, the wrong clock
was get. This leads to the wrong clock rate and slows down the kernel.
For example, it affects typical boot time:

 - without fix: over 1 minute
 - with    fix: 15 seconds
Tested-by: NStefan Roese <sr@denx.de>
Tested-by: NRalph Sennhauser <ralph.sennhauser@gmail.com>
Signed-off-by: NGregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: NDaniel Lezcano <daniel.lezcano@linaro.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes: 12549e27 ("clocksource/drivers/time-armada-370-xp: Convert init function to return error")
Link: http://lkml.kernel.org/r/1471429296-9053-1-git-send-email-daniel.lezcano@linaro.org
[ Refined the changelog. ]
Signed-off-by: NIngo Molnar <mingo@kernel.org>