cpu-exec: Rename cpu_resume_from_signal() to cpu_loop_exit_noexc()

cpu-exec: Rename cpu_resume_from_signal() to cpu_loop_exit_noexc()

The function cpu_resume_from_signal() is now always called with a
NULL puc argument, and is rather misnamed since it is never called
from a signal handler. It is essentially forcing an exit to the
top level cpu loop but without raising any exception, so rename
it to cpu_loop_exit_noexc() and drop the useless unused argument.

Signed-off-by: Peter Maydell <[email protected]>
Reviewed-by: Sergey Fedorov <[email protected]>
Acked-by: Eduardo Habkost <[email protected]>
Acked-by: Riku Voipio <[email protected]>
Message-id: 1463494687[email protected]