i586: Only add the current tune to PACKAGE_EXTRA_ARCHS
The generic x86 build supports i586 by default, so this specific tune
file technically doesn't add any specific ARCHes to PACKAGE_EXTRA_ARCHS.
For consistency, append the current tune to PACKAGE_EXTRA_ARCHS.
Since we do not have specific tune files for i386 and i486, just drop
them.
These could be added to tune-x86 version if there is a need to
maintain them, but they really do not belong here.
Signed-off-by: Darren Hart <dvhart@linux.intel.com> Cc: Richard Purdie <richard.purdie@linuxfoundation.org> Cc: Paul Eggleton <paul.eggleton@intel.com> Cc: Tom Zanussi <tom.zanussi@intel.com> Cc: Nitin Kamble <nitin.a.kamble@intel.com> Cc: Mark Hatle <mark.hatle@windriver.com> Cc: Bruce Ashfield <bruce.ashfield@windriver.com> Cc: Martin Jansa <martin.jansa@gmail.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
