clk: imx: clk-gpr-mux: Provide clock name in error message

In error case the error message doesn't provide much context:

imx:clk-gpr-mux: failed to get parent (-EINVAL)

So additionally provide the clock name in the message, in
order to simplify the further analyze.
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
Link: https://lore.kernel.org/r/20230308184603.10049-1-stefan.wahren@i2se.com

drivers/clk/imx/clk-gpr-mux.c

@@ -48,7 +48,8 @@ static u8 imx_clk_gpr_mux_get_parent(struct clk_hw *hw)
 	return ret;
 
 get_parent_err:
-	pr_err("failed to get parent (%pe)\n", ERR_PTR(ret));
+	pr_err("%s: failed to get parent (%pe)\n",
+	       clk_hw_get_name(hw), ERR_PTR(ret));
 
 	/* return some realistic non negative value. Potentially we could
 	 * give index to some dummy error parent.