更新

v1.6.0

整合了 hpm_sdk v1.6.0
升级 RT-Thread 到 v5.0.2
新增示例:
- blink_led
- mmcan_example
- ethernet_demo
- ethernet_ptp_master_demo
- ethernet_ptp_slave_demo
- flashdb_demo
- uart_dma_demo
- usb_device_generic_hid
- usb_host_msc_udisk
- pwm_demo