spi: rpc-if: Fix RPM imbalance in probe error path

If rpcif_hw_init() fails, Runtime PM is left enabled.

Fixes: b04cc0d9 ("memory: renesas-rpc-if: Add support for RZ/G2L")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://lore.kernel.org/r/1c78a1f447d019bb66b6e7787f520ae78821e2ae.1648562287.git.geert+renesas@glider.beSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-rpc-if.c

@@ -158,14 +158,18 @@ static int rpcif_spi_probe(struct platform_device *pdev)
 
 	error = rpcif_hw_init(rpc, false);
 	if (error)
-		return error;
+		goto out_disable_rpm;
 
 	error = spi_register_controller(ctlr);
 	if (error) {
 		dev_err(&pdev->dev, "spi_register_controller failed\n");
-		rpcif_disable_rpm(rpc);
+		goto out_disable_rpm;
 	}
 
+	return 0;
+
+out_disable_rpm:
+	rpcif_disable_rpm(rpc);
 	return error;
 }