x86: cleanup - rename VM_MASK to X86_VM_MASK

This patch renames VM_MASK to X86_VM_MASK (which
in turn defined as alias to X86_EFLAGS_VM) to better
distinguish from virtual memory flags. We can't just
use X86_EFLAGS_VM instead because it is also used
for conditional compilation

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/include/asm-x86/vm86.h b/include/asm-x86/vm86.h
index a2be241..f5f3dc4 100644
--- a/include/asm-x86/vm86.h
+++ b/include/asm-x86/vm86.h
@@ -17,9 +17,9 @@
 #define IOPL_MASK	0x00003000
 #define NT_MASK		0x00004000
 #ifdef CONFIG_VM86
-#define VM_MASK		0x00020000
+#define X86_VM_MASK	X86_EFLAGS_VM
 #else
-#define VM_MASK		0 /* ignored */
+#define X86_VM_MASK	0 /* No VM86 support */
 #endif
 #define AC_MASK		0x00040000
 #define VIF_MASK	0x00080000	/* virtual interrupt flag */