am335x: igep003x: Enable DM_SPI

Enable DM_SPI for am355x igep003x board.

Build is fine, but not tested.

Cc: Javier Martínez Canillas <javier@dowhile0.org>
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
diff --git a/configs/am335x_igep003x_defconfig b/configs/am335x_igep003x_defconfig
index 5295b6a..ee2cdf0 100644
--- a/configs/am335x_igep003x_defconfig
+++ b/configs/am335x_igep003x_defconfig
@@ -72,6 +72,7 @@
 CONFIG_MII=y
 CONFIG_DRIVER_TI_CPSW=y
 CONFIG_SPI=y
+CONFIG_DM_SPI=y
 CONFIG_OMAP3_SPI=y
 CONFIG_FAT_WRITE=y
 CONFIG_FDT_FIXUP_PARTITIONS=y