Fix some more code duplication with sclaar_arith.h
Do not clear IA32_FEATURE_CTRL MSR on soft reset (will clear the VMX lock bit)
On real HW XSAVE/XRSTOR which is not 4-byte aligned cause #AC(0) intead of #GP(0) when alignment check is enabled


git-svn-id: svn://svn.code.sf.net/p/bochs/code/trunk@12222 6c8e4198-a580-4521-a02f-c9ae86df1db9