[PATCH] m32r: fix a compile error of M32R SIO driver

[PATCH] m32r: fix a compile error of M32R SIO driver

Here is a patch to fix a compile error of m32r-sio.c.

	* include/asm-m32r/termbits.h:
	- Add CTVB definition.
	  This modification is derived from new-serial-flow-control.patch;

	  "[Patch] new serial flow control" (Oct. 4, 2004)
	  http://www.uwsg.iu.edu/hypermail/linux/kernel/0410.0/0853.html

Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>