use same USB Product ID for DFU and runtime mode

This was introduced for interoperability with operating systems that
might prefer such setup (I heard that Windows prefers this about a
decade ago, but I don't have any personal experience with it).

However, using different VID/PID between DFU and RT breaks usability of
dfu-util, and I really think this matters much more to our users and
developers.

.gitmodules

@@ -1,3 +0,0 @@
-[submodule "usb_application/pysim"]
-	path = usb_application/pysim
-	url = git://git.osmocom.org/pysim

firmware/libboard/common/include/board_common.h

@@ -103,12 +103,12 @@
 #define BOARD_USB_ENDPOINTS_BANKS(i)            (((i == 0) || (i == 3)) ? 1 : 2)
 
 #define USB_VENDOR_OPENMOKO		0x1d50
-#define USB_PRODUCT_OWHW_SAM3_DFU	0x4000
+#define USB_PRODUCT_OWHW_SAM3_DFU	0x4001	/* was 0x4000 */
 #define USB_PRODUCT_OWHW_SAM3		0x4001
 #define USB_PRODUCT_QMOD_HUB		0x4002
-#define USB_PRODUCT_QMOD_SAM3_DFU	0x4003
+#define USB_PRODUCT_QMOD_SAM3_DFU	0x4004	/* was 0x4003 */
 #define USB_PRODUCT_QMOD_SAM3		0x4004
-#define USB_PRODUCT_SIMTRACE2_DFU	0x60e2
+#define USB_PRODUCT_SIMTRACE2_DFU	0x60e3	/* was 0x60e2 */
 #define USB_PRODUCT_SIMTRACE2		0x60e3
 
 #define BOARD_USB_DFU