update dcd attr for samx7x

src/device/dcd_attr.h

@@ -77,6 +77,10 @@
   #define DCD_ATTR_ENDPOINT_MAX   6
   #define DCD_ATTR_ENDPOINT_EXCLUSIVE_NUMBER
 
+#elif TU_CHECK_MCU(SAMX7X)
+  #define DCD_ATTR_ENDPOINT_MAX   10
+  #define DCD_ATTR_ENDPOINT_EXCLUSIVE_NUMBER
+
 //------------- ST -------------//
 #elif TU_CHECK_MCU(STM32F0) || TU_CHECK_MCU(STM32F1) || TU_CHECK_MCU(STM32F3) || \
       TU_CHECK_MCU(STM32L0) || TU_CHECK_MCU(STM32L1) || TU_CHECK_MCU(STM32L4)