Move generic USB stuff to a subdir, dedupe .h files.

Adapt examples and the lib code accordingly.

lib/usb/usb.c

@@ -17,8 +17,8 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#include <usbd.h>
 #include <string.h>
+#include <usb/usbd.h>
 #include "usb_private.h"
 
 struct _usbd_device _usbd_device;
@@ -92,4 +92,3 @@ void _usbd_reset(void)
 	if(_usbd_device.user_callback_reset)
 		_usbd_device.user_callback_reset();
 }
-

lib/usb/usb_control.c

@@ -17,8 +17,8 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#include <usbd.h>
 #include <stdlib.h>
+#include <usb/usbd.h>
 #include "usb_private.h"
 
 static struct usb_control_state {
@@ -251,4 +251,3 @@ void _usbd_control_in(uint8_t ea)
 		usbd_ep_stall_set(0, 1);	
 	}
 }
-

lib/usb/usb_f103.c

@@ -20,9 +20,7 @@
 #include <libopenstm32/common.h>
 #include <libopenstm32/tools.h>
 #include <libopenstm32/usb.h>
-
-#include <usbd.h>
-
+#include <usb/usbd.h>
 #include "usb_private.h"
 
 /** Initialize USB Device Controller.
@@ -250,4 +248,3 @@ void usbd_poll(void)
 	if(istr & USB_ISTR_SOF) 
 		USB_CLR_ISTR_SOF();
 }
-

lib/usb/usb_private.h

@@ -17,7 +17,6 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-
 #ifndef __USB_PRIVATE_H
 #define __USB_PRIVATE_H
 
@@ -77,4 +76,3 @@ void _usbd_hw_set_address(uint8_t addr);
 void _usbd_hw_endpoints_reset(void);
 
 #endif
-

lib/usb/usb_standard.c

@@ -18,8 +18,7 @@
  */
 
 #include <string.h>
-
-#include <usbd.h>
+#include <usb/usbd.h>
 #include "usb_private.h"
 
 void usbd_register_set_config_callback(void (*callback)(uint16_t wValue))
@@ -370,4 +369,3 @@ int _usbd_standard_request(struct usb_setup_data *req, uint8_t **buf,
 		return 0;
 	}
 }
-