arm: Add beaglebone target, rename beagle

* beaglebone vs beagleboard
* While the boards are almost the same, they have
  diff. FDT's now (more memory, different layout etc)
* Make u-boot script more rpi-like
  (depend on u-boot for initial addresses)
* Wasn't working, still doesn't.

headers/private/kernel/arch/arm/board/beaglebone/board_config.h

@@ -0,0 +1,29 @@
+/*
+ * Copyright 2009
+ * Distributed under the terms of the MIT License.
+ */
+#ifndef _BOARD_BEAGLE_BONE_CONFIG_H
+#define _BOARD_BEAGLE_BONE_CONFIG_H
+
+
+#define BOARD_NAME_PRETTY "BeagleBone"
+
+#define BOARD_CPU_TYPE_OMAP 1
+#define BOARD_CPU_OMAP3 1
+
+#include <arch/arm/omap3.h>
+
+// UART Settings
+#define BOARD_UART_8250 1
+
+#define BOARD_UART1_BASE OMAP_UART1_BASE
+#define BOARD_UART2_BASE OMAP_UART2_BASE
+#define BOARD_UART3_BASE OMAP_UART3_BASE
+
+#define BOARD_UART_DEBUG BOARD_UART3_BASE
+
+#define BOARD_UART_CLOCK 48000000
+	// 48MHz (APLL96/2)
+
+
+#endif /* _BOARD_BEAGLE_BONE_CONFIG_H */