[PATCH] remove bogus con_is_present() prototypes

Although gcc seems to accept "extern" prototypes after it has seen the
"static inline" function, that's not really correct.

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Cc: James Simmons <jsimmons@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>