omap3: igep00x0: Switch to simple malloc in SPL

To save more space, switch to simple malloc here.

Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
diff --git a/configs/igep00x0_defconfig b/configs/igep00x0_defconfig
index 2c2da1e..b806f23 100644
--- a/configs/igep00x0_defconfig
+++ b/configs/igep00x0_defconfig
@@ -3,6 +3,7 @@
 CONFIG_TI_COMMON_CMD_OPTIONS=y
 CONFIG_TARGET_OMAP3_IGEP00X0=y
 CONFIG_SPL=y
+CONFIG_SPL_SYS_MALLOC_SIMPLE=y
 CONFIG_DISTRO_DEFAULTS=y
 CONFIG_NR_DRAM_BANKS=2
 CONFIG_OF_BOARD_SETUP=y