[PATCH] mbxfb: Document the new ioctl

This patch adds a new ioctl range for the mbxfb driver.
Signed-off-by: Raphael Assenat <raph@8d.com>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Acked-by: James Simmons <jsimmons@infradead.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Documentation/ioctl-number.txt

@@ -191,3 +191,5 @@ Code	Seq#	Include File		Comments
 					<mailto:aherrman@de.ibm.com>
 0xF3	00-3F	video/sisfb.h		sisfb (in development)
 					<mailto:thomas@winischhofer.net>
+0xF4	00-1F	video/mbxfb.h		mbxfb
+					<mailto:raph@8d.com>