dm: Move OMAP GPIO driver to drivers/gpio/

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Wolfgang Denk <wd@denx.de>
Cc: Albert Aribaud <albert.u.boot@aribaud.net>
Cc: U-Boot DM <u-boot-dm@lists.denx.de>
Cc: Tom Rini <trini@ti.com>
Acked-by: Tom Rini <trini@ti.com>
Signed-off-by: Tom Rini <trini@ti.com>
diff --git a/include/configs/omap3_zoom2.h b/include/configs/omap3_zoom2.h
index b60ece3..98b93f8 100644
--- a/include/configs/omap3_zoom2.h
+++ b/include/configs/omap3_zoom2.h
@@ -36,6 +36,7 @@
 #define CONFIG_OMAP		1	/* in a TI OMAP core */
 #define CONFIG_OMAP34XX		1	/* which is a 34XX */
 #define CONFIG_OMAP3_ZOOM2	1	/* working with Zoom II */
+#define CONFIG_OMAP_GPIO
 
 #define CONFIG_SDRC	/* The chip has SDRC controller */