[U-Boot] [PATCH] ARM: omapl138_lcdk: Shrink code size

[Adam Ford]

In preparation to use the device tree in SPL, the code +
malloc space needs to fit into 32k of space.  This patch
reduces the code size by converting to Thumb instructions
and using tiny libraries when possible. The result is
over 7k in code size reduction in SPL and a 140k reduction
in U-Boot.

Before

   text	   data	    bss	    dec	    hex	filename
  26544	   4072	   1376	  31992	   7cf8	spl/u-boot-spl
 607895	  39792	 129280	 776967	  bdb07	u-boot

After
   text	   data	    bss	    dec	    hex	filename
  19302	   4072	   1376	  24750	   60ae	spl/u-boot-spl
 464666	  39792	 129256	 633714	  9ab72	u-boot

Signed-off-by: Adam Ford <aford173 at gmail.com>

diff --git a/configs/omapl138_lcdk_defconfig b/configs/omapl138_lcdk_defconfig
index c69b9b15c4..7e470bf73e 100644
--- a/configs/omapl138_lcdk_defconfig
+++ b/configs/omapl138_lcdk_defconfig
@@ -1,4 +1,7 @@
 CONFIG_ARM=y
+CONFIG_SYS_THUMB_BUILD=y
+# CONFIG_SPL_USE_ARCH_MEMCPY is not set
+# CONFIG_SPL_USE_ARCH_MEMSET is not set
 CONFIG_ARCH_DAVINCI=y
 CONFIG_SYS_TEXT_BASE=0xc1080000
 CONFIG_TARGET_OMAPL138_LCDK=y
@@ -70,4 +73,5 @@ CONFIG_USB_MUSB_HOST=y
 CONFIG_USB_MUSB_DA8XX=y
 CONFIG_USB_MUSB_PIO_ONLY=y
 CONFIG_USB_STORAGE=y
+CONFIG_SPL_TINY_MEMSET=y
 # CONFIG_SPL_OF_LIBFDT is not set
-- 
2.17.1