ARM: omap: Enable tiny printf on omap3_logic

Enable support for tiny printf on the omap3_logic board to trim down
the SPL size. This makes the SPL actually build again and fit into
the SRAM.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Simon Glass <sjg@chromium.org>
Cc: Tom Rini <trini@konsulko.com>
Cc: lesne@alse-fr.com
Reviewed-by: Tom Rini <trini@konsulko.com>

configs/omap3_logic_defconfig

 CONFIG_ARM=y
 CONFIG_OMAP34XX=y
 CONFIG_TARGET_OMAP3_LOGIC=y
+CONFIG_USE_TINY_PRINTF=y
 CONFIG_SPL=y
 CONFIG_FIT=y
 CONFIG_SYS_EXTRA_OPTIONS="NAND"