[PATCH] unexport console_unblank

I didn't find any possible modular usage of console_unblank in the
kernel.

This patch was already ACK'ed by Alan Cox.

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>