gpiolib-acpi: Drop unneeded ERR_CAST() in __acpi_find_gpio()

The checked type by PTR_ERR() is the same as returned by __acpi_find_gpio().
Hence there is no need to cast, drop it.

Acked-by: Mika Westerberg <westeri@kernel.org>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

Author: andy-shev

drivers/gpio/gpiolib-acpi.c

@@ -994,7 +994,7 @@ __acpi_find_gpio(struct fwnode_handle *fwnode, const char *con_id, unsigned int
 			desc = acpi_get_gpiod_from_data(fwnode,
 							propname, idx, info);
 		if (PTR_ERR(desc) == -EPROBE_DEFER)
-			return ERR_CAST(desc);
+			return desc;
 
 		if (!IS_ERR(desc))
 			return desc;