staging: msm/lcdc.c: Convert IS_ERR result to PTR_ERR

This code elsewhere returns a negative constant to an indicate an error,
while IS_ERR returns the result of a >= operation.

The semantic patch that fixes this problem is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
expression x;
@@

 if (...) { ...
- return IS_ERR(x);
+ return PTR_ERR(x);
}
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
Acked-by: David Brown <davidb@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/msm/lcdc.c

@@ -224,12 +224,12 @@ static int __init lcdc_driver_init(void)
 	mdp_lcdc_pclk_clk = clk_get(NULL, "mdp_lcdc_pclk_clk");
 	if (IS_ERR(mdp_lcdc_pclk_clk)) {
 		printk(KERN_ERR "error: can't get mdp_lcdc_pclk_clk!\n");
-		return IS_ERR(mdp_lcdc_pclk_clk);
+		return PTR_ERR(mdp_lcdc_pclk_clk);
 	}
 	mdp_lcdc_pad_pclk_clk = clk_get(NULL, "mdp_lcdc_pad_pclk_clk");
 	if (IS_ERR(mdp_lcdc_pad_pclk_clk)) {
 		printk(KERN_ERR "error: can't get mdp_lcdc_pad_pclk_clk!\n");
-		return IS_ERR(mdp_lcdc_pad_pclk_clk);
+		return PTR_ERR(mdp_lcdc_pad_pclk_clk);
 	}
 //	pm_qos_add_requirement(PM_QOS_SYSTEM_BUS_FREQ , "lcdc",
 //				PM_QOS_DEFAULT_VALUE);