omap3_logic: Switch to simple malloco in SPL

To save more space, switch to simple malloc here.

Signed-off-by: Tom Rini <trini@konsulko.com>

configs/omap3_logic_defconfig

@@ -5,6 +5,7 @@ CONFIG_SYS_EXTRA_OPTIONS="NAND"
 CONFIG_SYS_CONSOLE_INFO_QUIET=y
 CONFIG_VERSION_VARIABLE=y
 CONFIG_SPL=y
+CONFIG_SPL_SYS_MALLOC_SIMPLE=y
 CONFIG_SPL_MTD_SUPPORT=y
 CONFIG_SPL_OS_BOOT=y
 CONFIG_HUSH_PARSER=y