Moved vp8_encode_bool into boolhuff.h

allowing the compiler to inline this function.  For real-time
encodes, this gave a boost of 1% to 2.5%, depending on the
speed setting.

Change-Id: I3929d176cca086b4261267b848419d5bcff21c02
diff --git a/vp8/decoder/dboolhuff.h b/vp8/decoder/dboolhuff.h
index f729837..853c10f 100644
--- a/vp8/decoder/dboolhuff.h
+++ b/vp8/decoder/dboolhuff.h
@@ -34,7 +34,7 @@
     unsigned int         range;
 } BOOL_DECODER;
 
-DECLARE_ALIGNED(16, extern const unsigned char, vp8dx_bitreader_norm[256]);
+DECLARE_ALIGNED(16, extern const unsigned char, vp8_norm[256]);
 
 int vp8dx_start_decode(BOOL_DECODER *br,
                        const unsigned char *source,
@@ -101,7 +101,7 @@
     }
 
     {
-        register unsigned int shift = vp8dx_bitreader_norm[range];
+        register unsigned int shift = vp8_norm[range];
         range <<= shift;
         value <<= shift;
         count -= shift;