rellback part of commit with xmm register access interface changes - doesn't work for big endian hosts

git-svn-id: svn://svn.code.sf.net/p/bochs/code/trunk@11816 6c8e4198-a580-4521-a02f-c9ae86df1db9
merge AVX and SSE .bochsrc options to single SIMD option which will configure SSE and AVX together

git-svn-id: svn://svn.code.sf.net/p/bochs/code/trunk@11817 6c8e4198-a580-4521-a02f-c9ae86df1db9