ARM: omap3: fix LTO for DM3730 (and possibly other omap3 boards)

Adam Ford says that DM3730 needs board.c compiled without LTO flags.

Signed-off-by: Marek Behún <marek.behun@nic.cz>
Tested-by: Adam Ford <aford173@gmail.com>

arch/arm/mach-omap2/omap3/Makefile

@@ -9,6 +9,7 @@ CFLAGS_clock.o += -marm
 obj-y	:= lowlevel_init.o
 
 obj-y	+= board.o
+CFLAGS_REMOVE_board.o := $(LTO_CFLAGS)
 obj-y	+= boot.o
 obj-y	+= clock.o
 obj-y	+= sys_info.o