If the override clocksource name is empty there is no point in walking the
clocksource list for a match.
Signed-off-by: NBaolin Wang <baolin.wang@linaro.org>
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Cc: arnd@arndb.de
Cc: sboyd@codeaurora.org
Cc: broonie@kernel.org
Cc: john.stultz@linaro.org
Link: https://lkml.kernel.org/r/069ce2a605546bcad6552968cff755f0a03f9f10.1516167691.git.baolin.wang@linaro.org