soc: imx: gpcv2: Print the correct error code

The current code prints 'ret' (thus 0) while it should use 'err'.
Signed-off-by: Guido Günther <agx@sigxcpu.org>
Reviewed-by: Daniel Baluta <daniel.baluta@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

drivers/soc/imx/gpcv2.c

@@ -198,7 +198,7 @@ static int imx_gpc_pu_pgc_sw_pxx_req(struct generic_pm_domain *genpd,
 		err = regulator_disable(domain->regulator);
 		if (err)
 			dev_err(domain->dev,
-				"failed to disable regulator: %d\n", ret);
+				"failed to disable regulator: %d\n", err);
 		/* Preserve earlier error code */
 		ret = ret ?: err;
 	}