NFC: trf7970a: Remove unnecessary local variable initialization

There is no need to initialize the 'ret' variable
in trf7970a_resume().

Signed-off-by: Mark A. Greer <mgreer@animalcreek.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
diff --git a/drivers/nfc/trf7970a.c b/drivers/nfc/trf7970a.c
index 00149a9..59a7df7f 100644
--- a/drivers/nfc/trf7970a.c
+++ b/drivers/nfc/trf7970a.c
@@ -2139,7 +2139,7 @@
 {
 	struct spi_device *spi = container_of(dev, struct spi_device, dev);
 	struct trf7970a *trf = spi_get_drvdata(spi);
-	int ret = 0;
+	int ret;
 
 	dev_dbg(dev, "Resume\n");