linux/compat.h: Add wait_event_timeout macro
Add wait_event_timeout - sleep until a condition gets true or a timeout elapses. This is a stripped version of the same from Linux kernel with the following u-boot specific modifications: - no wait queues supported - use u-boot timer to detect timeouts - check for Ctrl-C pressed during wait Signed-off-by: NOleksandr Andrushchenko <oleksandr_andrushchenko@epam.com> Signed-off-by: NAnastasiia Lukianenko <anastasiia_lukianenko@epam.com> [trini: Drop atomic_read from gadget/ether.c as this has existed for a while and now causes problems] Signed-off-by: NTom Rini <trini@konsulko.com>
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