device: Make number of endpoints configurable

Currently number of endpoints was hard coded to 8.
NRF52 has 9 IN and 9 OUT endpoints.
ISO endpoints are 0x08 and 0x88 and without this change those
two ISO endpoint could not be used.

src/device/usbd.c

@@ -37,6 +37,10 @@
 #define CFG_TUD_TASK_QUEUE_SZ   16
 #endif
 
+#ifndef CFG_TUD_EP_MAX
+#define CFG_TUD_EP_MAX          9
+#endif
+
 //--------------------------------------------------------------------+
 // Device Data
 //--------------------------------------------------------------------+
@@ -57,7 +61,7 @@ typedef struct
   uint8_t speed;
 
   uint8_t itf2drv[16];     // map interface number to driver (0xff is invalid)
-  uint8_t ep2drv[8][2];    // map endpoint to driver ( 0xff is invalid )
+  uint8_t ep2drv[CFG_TUD_EP_MAX][2]; // map endpoint to driver ( 0xff is invalid )
 
   struct TU_ATTR_PACKED
   {
@@ -66,7 +70,7 @@ typedef struct
     volatile bool claimed : 1;
 
     // TODO merge ep2drv here, 4-bit should be sufficient
-  }ep_status[8][2];
+  }ep_status[CFG_TUD_EP_MAX][2];
 
 }usbd_device_t;
 
@@ -249,7 +253,7 @@ static osal_mutex_t _usbd_mutex;
 //--------------------------------------------------------------------+
 // Prototypes
 //--------------------------------------------------------------------+
-static void mark_interface_endpoint(uint8_t ep2drv[8][2], uint8_t const* p_desc, uint16_t desc_len, uint8_t driver_id);
+static void mark_interface_endpoint(uint8_t ep2drv[][2], uint8_t const* p_desc, uint16_t desc_len, uint8_t driver_id);
 static bool process_control_request(uint8_t rhport, tusb_control_request_t const * p_request);
 static bool process_set_config(uint8_t rhport, uint8_t cfg_num);
 static bool process_get_descriptor(uint8_t rhport, tusb_control_request_t const * p_request);
@@ -842,7 +846,7 @@ static bool process_set_config(uint8_t rhport, uint8_t cfg_num)
 }
 
 // Helper marking endpoint of interface belongs to class driver
-static void mark_interface_endpoint(uint8_t ep2drv[8][2], uint8_t const* p_desc, uint16_t desc_len, uint8_t driver_id)
+static void mark_interface_endpoint(uint8_t ep2drv[][2], uint8_t const* p_desc, uint16_t desc_len, uint8_t driver_id)
 {
   uint16_t len = 0;