Fix chapter reference in CodingStyle

commit 226a6b84 renumbered Chapter 11 in
Documentation/CodingStyle to Chapter 12, but it didn't update the reference
to that chapter further down in the file.  This patch corrects the chapter
reference.
Signed-off-by: NJesper Juhl <jesper.juhl@gmail.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Documentation/CodingStyle

@@ -640,7 +640,7 @@ language.
 
 There appears to be a common misperception that gcc has a magic "make me
 faster" speedup option called "inline". While the use of inlines can be
-appropriate (for example as a means of replacing macros, see Chapter 11), it
+appropriate (for example as a means of replacing macros, see Chapter 12), it
 very often is not. Abundant use of the inline keyword leads to a much bigger
 kernel, which in turn slows the system as a whole down, due to a bigger
 icache footprint for the CPU and simply because there is less memory