Documentation: Docbook: Fix files location change of kernel/[hr]timer.c

make xmldocs failed because of file location change
from kernel/[hr]timer.c to kernel/time/[hr]timer.c.

Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Cc: john.stultz@linaro.org
Cc: rdunlap@infradead.org
Link: http://lkml.kernel.org/r/1405017830-31194-1-git-send-email-standby24x7@gmail.com


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