Use config.h as the main source of configuration data. Fixed some boot.c

glitches.

- fw/boot/boot.c, fw/boot/dfu.c: include config.h for platform defines
- fw/common/Makefile.common: add $(F32XBASE)/fw/common to include search
  path
- fw/boot/boot.c: define dummy for uart_init if no debugging is enabled
- fw/boot/boot.c (PLATFORM_EXIT): typo PLAYFORM_EXIT
- fw/boot/boot.c (run_payload): rename BOOT_SETUP to PLATFORM_SETUP
- fw/boot/dfu.c (device_descriptor): use USB_PRODUCT instead of
  USB_PRODUCT_IDBG_DFU
- fw/boot/config.h: removed for now. Might bring it back later as template.
- fw/boot/version.h: moved to fw/common/
- fw/common/Makefile.system: remove serial setup

fw/boot/dfu.c

@@ -32,6 +32,8 @@
 #include "usb.h"
 #include "dfu.h"
 
+#include "config.h"
+
 
 #ifndef NULL
 #define NULL 0
@@ -50,7 +52,7 @@ const uint8_t device_descriptor[] = {
 	0x00,			/* bDeviceProtocol (per interface) */
 	EP0_SIZE,		/* bMaxPacketSize */
 	LE(USB_VENDOR),		/* idVendor */
-	LE(USB_PRODUCT_IDBG_DFU),/* idProduct */
+	LE(USB_PRODUCT),	/* idProduct */
 	LE(0x0001),		/* bcdDevice */
 	0,			/* iManufacturer */
 	0,			/* iProduct */