ARM: da850evm: Enable USE_TINY_PRINTF

The SPL space is limited.  In order to try to enable DM in SPL,
we need more space. This reduces the size of SPL by ~2.7K

before:
   text	   data	    bss	    dec	    hex	filename
  20760	   1216	     80	  22056	   5628	spl/u-boot-spl
after:
   text	   data	    bss	    dec	    hex	filename
  17947	   1216	     80	  19243	   4b2b	spl/u-boot-spl

Signed-off-by: Adam Ford <aford173@gmail.com>
diff --git a/configs/da850evm_defconfig b/configs/da850evm_defconfig
index 2ee02c7..560621a 100644
--- a/configs/da850evm_defconfig
+++ b/configs/da850evm_defconfig
@@ -57,3 +57,4 @@
 CONFIG_DM_SPI=y
 CONFIG_DAVINCI_SPI=y
 # CONFIG_FAT_WRITE is not set
+CONFIG_USE_TINY_PRINTF=y