Add #define REGc

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@5988 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

libavutil/x86_cpu.h

@@ -15,6 +15,7 @@
 #  define REGBP   rbp
 #  define REGa    rax
 #  define REGb    rbx
+#  define REGc    rcx
 #  define REGSP   rsp
 
 #else
@@ -32,6 +33,7 @@
 #  define REGBP   ebp
 #  define REGa    eax
 #  define REGb    ebx
+#  define REGc    ecx
 #  define REGSP   esp
 #endif