spi: soft_spi: fix miso gpio property name

The patch fix a missprint introduced in commit 2e9fe73a883a ("spi: soft_spi:
Support the recommended soft spi properties").

Signed-off-by: Mikhail Kshevetskiy <mikhail.kshevetskiy@iopsys.eu>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
diff --git a/drivers/spi/soft_spi.c b/drivers/spi/soft_spi.c
index 9bdb4a5..04691d3 100644
--- a/drivers/spi/soft_spi.c
+++ b/drivers/spi/soft_spi.c
@@ -271,7 +271,7 @@
 	ret = gpio_request_by_name(dev, "gpio-miso", 0, &plat->miso,
 				   GPIOD_IS_IN);
 	if (ret)
-		ret = gpio_request_by_name(dev, "gpio-miso", 0, &plat->miso,
+		ret = gpio_request_by_name(dev, "miso-gpios", 0, &plat->miso,
 					   GPIOD_IS_IN);
 	if (ret)
 		plat->flags |= SPI_MASTER_NO_RX;