V4L/DVB (4378): Ttpci/: remove unneeded #include <linux/byteorder/swabb.h>'s

Since av7110.c is the only file actually using something from this 
header, there's no reson for other files to

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>