KVM: SVM: Make dump_vmcb static, reduce text

dump_vmcb isn't used outside this module, make it static.
Shrink text and object by ~1% by standardizing formats.

$ size arch/x86/kvm/svm.o*
   text	   data	    bss	    dec	    hex	filename
  52910	    580	  10072	  63562	   f84a	arch/x86/kvm/svm.o.new
  53563	    580	  10072	  64215	   fad7	arch/x86/kvm/svm.o.old

Signed-off-by: Joe Perches <joe@perches.com>
Acked-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Avi Kivity <avi@redhat.com>