[media] drxk: Improve the scu_command error message

Now, it outputs:

[10927.639641] drxk: SCU_RESULT_INVPAR while sending cmd 0x0203 with params:
[10927.646283] drxk: 02 00 00 00 10 00 07 00 03 02                    ..........

Better than ERROR -3. This happens with Terratec H5 firmware.

It adds 2 new error conditions, and something useful to track
what the heck is that.

I suspect that the scu_command is dependent on the firmware
revision.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/dvb/frontends/drxk_hard.h b/drivers/media/dvb/frontends/drxk_hard.h
index a20a19d..a05c32e 100644
--- a/drivers/media/dvb/frontends/drxk_hard.h
+++ b/drivers/media/dvb/frontends/drxk_hard.h
@@ -20,6 +20,8 @@
 #define DRX_SCU_READY   0
 #define DRXK_MAX_WAITTIME (200)
 #define SCU_RESULT_OK      0
+#define SCU_RESULT_SIZE   -4
+#define SCU_RESULT_INVPAR -3
 #define SCU_RESULT_UNKSTD -2
 #define SCU_RESULT_UNKCMD -1