x86: rename pat_wc_enabled to pat_enabled

BTW, what does pat_wc_enabled stand for? Does it mean
"write-combining"?

Currently it is used to globally switch on or off PAT support.
Thus I renamed it to pat_enabled.
I think this increases readability (and hope that I didn't miss
something).

Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/include/asm-x86/pat.h b/include/asm-x86/pat.h
index 6fa9710..7edc473 100644
--- a/include/asm-x86/pat.h
+++ b/include/asm-x86/pat.h
@@ -4,10 +4,10 @@
 #include <linux/types.h>
 
 #ifdef CONFIG_X86_PAT
-extern int pat_wc_enabled;
+extern int pat_enabled;
 extern void validate_pat_support(struct cpuinfo_x86 *c);
 #else
-static const int pat_wc_enabled;
+static const int pat_enabled;
 static inline void validate_pat_support(struct cpuinfo_x86 *c) { }
 #endif