[binutils-gdb] sim: drop support for requiring hw support

[sergiodj+buildbot@redhat.com]

*** TEST RESULTS FOR COMMIT 64dd13dfc267b1d13f42519f220e89a4386591fd ***

Author: Mike Frysinger <vapier@gentoo.org>
Branch: master
Commit: 64dd13dfc267b1d13f42519f220e89a4386591fd

sim: drop support for requiring hw support
Since no sim is using the "always" option to SIM_AC_OPTION_HARDWARE, and
we don't want to require hw support to always be enabled, drop the option.
This leads to a slight simplification in the macro too as we can collapse
the sim_hw_p variable.