hrtimer: Drop return code of hrtimer_switch_to_hres()

It's not checked by the caller.

Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Link: http://lkml.kernel.org/r/20150811164043.538241ef@redhat.com


Signed-off-by: Thomas Gleixner <tglx@linutronix.de>