Some work on the USB MSD emulation
- prepared seek timer feature
- removed error handling that would cause a segfault
- better error handling for CD-ROM read errors


git-svn-id: svn://svn.code.sf.net/p/bochs/code/trunk@12139 6c8e4198-a580-4521-a02f-c9ae86df1db9
implemented vperm* avx-512 opcodes

git-svn-id: svn://svn.code.sf.net/p/bochs/code/trunk@12140 6c8e4198-a580-4521-a02f-c9ae86df1db9
added one more missed perm* avx-512 opcode

git-svn-id: svn://svn.code.sf.net/p/bochs/code/trunk@12141 6c8e4198-a580-4521-a02f-c9ae86df1db9