include: move TFR to osdep.h

The macro requires EINTR, which has its header included in osdep.h.

(Not sure what TFR stands for, perhaps "Test For Retry". Rename it ?)

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20220323155743.1585078-17-marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>