remoteproc: don't use PTR_RET().

We've already tested that it's an error.

Cc: Robert Tivy <[e-mail]>
Signed-off-by: Rusty Russell <[e-mail]>
Acked-by: Ohad Ben-Cohen <[e-mail]>

drivers/remoteproc/da8xx_remoteproc.c

···
 	dsp_clk = clk_get(dev, NULL);
 	if (IS_ERR(dsp_clk)) {
 		dev_err(dev, "clk_get error: %ld\n", PTR_ERR(dsp_clk));
-		return PTR_RET(dsp_clk);
+		return PTR_ERR(dsp_clk);
 	}
 
 	davinci_clk_reset_assert(dsp_clk);