error unknown type name cycle_t

drivers/clocksource/ingenic_core_ost.c:124:8: error: unknown type name 'cycle_t'
 static cycle_t core_clocksource_get_cycles(struct clocksource *cs)
        ^~~~~~~
commit a5a1d1c2914b5316924c7893eb683a5420ebd3be
Author: Thomas Gleixner <tglx@linutronix.de>
Date:   Wed Dec 21 20:32:01 2016 +0100

    clocksource: Use a plain u64 instead of cycle_t

    There is no point in having an extra type for extra confusion. u64 is
    unambiguous.

    Conversion was done with the following coccinelle script:

    @rem@
    @@
    -typedef u64 cycle_t;

    @fix@
    typedef cycle_t;
    @@
    -cycle_t
    +u64
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