[media] saa7134: prepare to use pr_foo macros

Add a pr_fmt macro, and move saa7134.h header to the beginning,
to avoid warnings when using the pr_foo macros.

Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

diff --cc drivers/media/pci/saa7134/saa7134-alsa.c
Simple merge

diff --cc drivers/media/pci/saa7134/saa7134-cards.c
Simple merge

diff --cc drivers/media/pci/saa7134/saa7134-core.c
Simple merge

diff --cc drivers/media/pci/saa7134/saa7134-dvb.c
Simple merge

diff --cc drivers/media/pci/saa7134/saa7134-empress.c
Simple merge

diff --cc drivers/media/pci/saa7134/saa7134-go7007.c
Simple merge

diff --cc drivers/media/pci/saa7134/saa7134-i2c.c
Simple merge

diff --cc drivers/media/pci/saa7134/saa7134-input.c
Simple merge

diff --cc drivers/media/pci/saa7134/saa7134-ts.c
Simple merge

diff --cc drivers/media/pci/saa7134/saa7134-tvaudio.c
Simple merge

diff --cc drivers/media/pci/saa7134/saa7134-vbi.c
Simple merge

diff --cc drivers/media/pci/saa7134/saa7134-video.c
Simple merge

diff --cc drivers/media/pci/saa7134/saa7134.h
Simple merge