dm: acpi: Use correct GPIO polarity type in acpi_dp_add_gpio()

This function currently accepts the IRQ-polarity type. Fix it to use the
GPIO type instead.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/include/acpi/acpi_dp.h b/include/acpi/acpi_dp.h
index 0b514bc..5e539b1 100644
--- a/include/acpi/acpi_dp.h
+++ b/include/acpi/acpi_dp.h
@@ -221,7 +221,7 @@
  */
 struct acpi_dp *acpi_dp_add_gpio(struct acpi_dp *dp, const char *name,
 				 const char *ref, int index, int pin,
-				 enum acpi_irq_polarity polarity);
+				 enum acpi_gpio_polarity polarity);
 
 /**
  * acpi_dp_write() - Write Device Property hierarchy and clean up resources