tree ccbbf183c56ace34e6dcd41bc19778c543ca0498
parent 1be063f7bf1bfc1c448035113ab054f0af0a21bd
author Nathan Hjelm <hjelmn@me.com> 1600142774 -0600
committer Nathan Hjelm <hjelmn@me.com> 1600142947 -0600

libusbi.h: fix warning about redefined macros

In macOS 11.x the USEC_PER_SEC and NSEC_PER_SEC are defined by a system
header. The values are the same so use the system defines if they are
available.

Signed-off-by: Nathan Hjelm <hjelmn@google.com>