dm: Select CONFIG_SPL_GPIO_SUPPORT on OMAP

This fixes the breakage with SPL on most OMAP boards after the GPIO
driver was moved.

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/tam3517-common.h b/include/configs/tam3517-common.h
index 777f77c..0751a9c 100644
--- a/include/configs/tam3517-common.h
+++ b/include/configs/tam3517-common.h
@@ -251,6 +251,7 @@
 #define CONFIG_SPL_I2C_SUPPORT
 #define CONFIG_SPL_LIBGENERIC_SUPPORT
 #define CONFIG_SPL_SERIAL_SUPPORT
+#define CONFIG_SPL_GPIO_SUPPORT
 #define CONFIG_SPL_POWER_SUPPORT
 #define CONFIG_SPL_NAND_SUPPORT
 #define CONFIG_SPL_LDSCRIPT		"$(CPUDIR)/omap-common/u-boot-spl.lds"