nfc: trf7970a: drop unneeded debug prints

ftrace is a preferred and standard way to debug entering and exiting
functions so drop useless debug prints.

Signed-off-by: Krzysztof Kozlowski <[e-mail]>
Acked-by: Mark Greer <[e-mail]>
Signed-off-by: Jakub Kicinski <[e-mail]>

drivers/nfc/trf7970a.c

···
 	struct spi_device *spi = to_spi_device(dev);
 	struct trf7970a *trf = spi_get_drvdata(spi);
 
-	dev_dbg(dev, "Suspend\n");
-
 	mutex_lock(&trf->lock);
 
 	trf7970a_shutdown(trf);
···
 	struct spi_device *spi = to_spi_device(dev);
 	struct trf7970a *trf = spi_get_drvdata(spi);
 	int ret;
-
-	dev_dbg(dev, "Resume\n");
 
 	mutex_lock(&trf->lock);
 
···
 	struct trf7970a *trf = spi_get_drvdata(spi);
 	int ret;
 
-	dev_dbg(dev, "Runtime suspend\n");
-
 	mutex_lock(&trf->lock);
 
 	ret = trf7970a_power_down(trf);
···
 	struct spi_device *spi = to_spi_device(dev);
 	struct trf7970a *trf = spi_get_drvdata(spi);
 	int ret;
-
-	dev_dbg(dev, "Runtime resume\n");
 
 	ret = trf7970a_power_up(trf);
 	if (!ret)