[PATCH v2] drm/msm: Use 64-bit timekeeping

[Tina Ruchandani]

>> which only does one 64-bit division, and it's one that we can probably
>> optimize out in the future (we can check in ktime_ms_delta whether the
>> difference is more than 2^32 nanoseconds as the fast path).

It looks like ktime_divns already has that optimization for 32-bit divisor,
so your solution should avoid the 64-bit division.