do not use cpuid:level param when it doesn't exists

git-svn-id: svn://svn.code.sf.net/p/bochs/code/trunk@11715 6c8e4198-a580-4521-a02f-c9ae86df1db9
remove debug print from Sandy Bridge CPUID wrongly commited

git-svn-id: svn://svn.code.sf.net/p/bochs/code/trunk@11716 6c8e4198-a580-4521-a02f-c9ae86df1db9