[media] saa7164: add firmware debug message collection and procfs changes

Check for PROCFS and dynamically adjust code.
Cache some PCIe values in the device context.
Provide a mechanism to collect the debug messages
coming from the firmware.

Signed-off-by: Steven Toth <stoth@kernellabs.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/video/saa7164/saa7164-reg.h b/drivers/media/video/saa7164/saa7164-reg.h
index b950f41..153da76 100644
--- a/drivers/media/video/saa7164/saa7164-reg.h
+++ b/drivers/media/video/saa7164/saa7164-reg.h
@@ -213,3 +213,6 @@
 #define EU_AUDIO_FORMAT_CONTROL		0x0C
 #define EU_AUDIO_BIT_RATE_CONTROL	0x0D
 
+/* Firmware Debugging */
+#define SET_DEBUG_LEVEL_CONTROL	0x0B
+#define GET_DEBUG_DATA_CONTROL	0x0C