V4L/DVB (7510): media/dvb/bt8xx replace remaining __FUNCTION__ occurrences

__FUNCTION__ is gcc-specific, use __func__

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
diff --git a/drivers/media/dvb/bt8xx/dst.c b/drivers/media/dvb/bt8xx/dst.c
index 307ff35..75711bd 100644
--- a/drivers/media/dvb/bt8xx/dst.c
+++ b/drivers/media/dvb/bt8xx/dst.c
@@ -1290,7 +1290,7 @@
 {
 	int retval;
 	u8 get_signal[] = { 0x00, 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0xfb };
-	//dprintk("%s: Getting Signal strength and other parameters\n", __FUNCTION__);
+	//dprintk("%s: Getting Signal strength and other parameters\n", __func__);
 	if ((state->diseq_flags & ATTEMPT_TUNE) == 0) {
 		state->decode_lock = state->decode_strength = state->decode_snr = 0;
 		return 0;