clockevents/drivers/Kconfig: Replace USE_OF with OF
clockevents/drivers/Kconfig: Replace USE_OF with OF

USE_OF is used as intermediate Kconfig option by few arch's (ARM, MIPS,
Xtensa); in all these cases it implies setting option OF too. Replace the
only instance of USE_OF in clocksource with OF.

Signed-off-by: Antonio Borneo <671da3e274b6e69bd6120633f915f839d634d12f@gmail.com>
Signed-off-by: Daniel Lezcano <e9fa45941f2ebe89c1b9d6c5f339ab42eadb8567@linaro.org>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs