MFC r359428:
evdev: Add COMPAT_FREEBSD32 support for amd64 arch

Incompatibility between i386 and amd64 evdev ABIs was caused by presence of
'struct timeval' in evdev protocol. Replace it with 'struct timeval32' for
32 bit binaries.

Big-endian platforms may require additional work due to bitstr_t (array of
unsigned longs) usage in ioctl interface.

MFC r359429:
evdev: return error rather than zero-length data on blocked read()
if blocked process has been woken up by evdev device destruction.