ARM: enable device tree for beagle

For testing ARM device tree support

Signed-off-by: John Rigby <john.rigby@linaro.org>
Acked-by: Wolfgang Denk <wd@denx.de>

include/configs/omap3_beagle.h

@@ -55,6 +55,15 @@
 #undef CONFIG_USE_IRQ				/* no support for IRQs */
 #define CONFIG_MISC_INIT_R
 
+#define CONFIG_OF_LIBFDT		1
+/*
+ * The early kernel mapping on ARM currently only maps from the base of DRAM
+ * to the end of the kernel image.  The kernel is loaded at DRAM base + 0x8000.
+ * The early kernel pagetable uses DRAM base + 0x4000 to DRAM base + 0x8000,
+ * so that leaves DRAM base to DRAM base + 0x4000 available.
+ */
+#define CONFIG_SYS_BOOTMAPSZ	        0x4000
+
 #define CONFIG_CMDLINE_TAG		1	/* enable passing of ATAGs */
 #define CONFIG_SETUP_MEMORY_TAGS	1
 #define CONFIG_INITRD_TAG		1