move security related funcs into security.c

there are still some security related funcs in cpu_caps.c & cpu.c,
move them out into security.c.

Changes to be committed:
	modified:   Makefile
	modified:   arch/x86/cpu.c
	modified:   arch/x86/cpu_caps.c
	modified:   arch/x86/guest/vcpu.c
	new file:   arch/x86/security.c
	modified:   arch/x86/trusty.c
	modified:   arch/x86/vmx_asm.S
	modified:   include/arch/x86/cpu.h
	modified:   include/arch/x86/cpu_caps.h
	modified:   include/arch/x86/per_cpu.h
	new file:   include/arch/x86/security.h

Tracked-On: #1842
Signed-off-by: Jason Chen CJ <jason.cj.chen@intel.com>

hypervisor/include/arch/x86/per_cpu.h

@@ -18,6 +18,7 @@
 #include <logmsg.h>
 #include "arch/x86/guest/instr_emul.h"
 #include <profiling.h>
+#include <security.h>
 
 struct per_cpu_region {
 	/* vmxon_region MUST be 4KB-aligned */