OMAPDSS: panel-sharp-ls037v7dw01: update to use gpiod

[Dan Carpenter]

[ It's weird that I'm just now getting this warning from 2014...  Oh
well, looks legit. -dan ]

Hello Tony Lindgren,

The patch 9522f9fe86f9: "OMAPDSS: panel-sharp-ls037v7dw01: update to
use gpiod" from Apr 28, 2014, leads to the following static checker
warning:

	drivers/gpu/drm/omapdrm/displays/panel-sharp-ls037v7dw01.c:213 sharp_ls_get_gpio()
	warn: 'gd' isn't an ERR_PTR

drivers/gpu/drm/omapdrm/displays/panel-sharp-ls037v7dw01.c
   200  static int sharp_ls_get_gpio(struct device *dev, int gpio, unsigned long flags,
   201                    char *desc, struct gpio_desc **gpiod)
   202  {
   203          struct gpio_desc *gd;
   204          int r;
   205  
   206          *gpiod = NULL;
   207  
   208          r = devm_gpio_request_one(dev, gpio, flags, desc);
   209          if (r)
   210                  return r == -ENOENT ? 0 : r;
   211  
   212          gd = gpio_to_desc(gpio);
   213          if (IS_ERR(gd))
   214                  return PTR_ERR(gd) == -ENOENT ? 0 : PTR_ERR(gd);
                               ^^^^^^^^^^^^^^^^^^^^^^
gd can be an ERR_PTR if gpio_to_desc is defined out but it's never
-ENOENT.

   215  
   216          *gpiod = gd;
   217          return 0;
   218  }

regards,
dan carpenter