ieee802154/adf7242: fix memory leak of firmware

If the firmware upload or the firmware verification fails then we
printed the error message and exited but we missed releasing the
firmware.

Signed-off-by: Sudip Mukherjee <sudip.mukherjee@codethink.co.uk>
Acked-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

drivers/net/ieee802154/adf7242.c

@@ -1030,6 +1030,7 @@ static int adf7242_hw_init(struct adf7242_local *lp)
 	if (ret) {
 		dev_err(&lp->spi->dev,
 			"upload firmware failed with %d\n", ret);
+		release_firmware(fw);
 		return ret;
 	}
 
@@ -1037,6 +1038,7 @@ static int adf7242_hw_init(struct adf7242_local *lp)
 	if (ret) {
 		dev_err(&lp->spi->dev,
 			"verify firmware failed with %d\n", ret);
+		release_firmware(fw);
 		return ret;
 	}