1. Add 980 drv_usbd. 2. EMAC - move MDC CLK divider before EMAC initialization. 3. Correct NUC980 and M480 CAN RX_MSG_ID_INDEX definition. 4. add USBD cdc demo - vcom_echo. 5. mnt - add mount_table definition.
1. Make up sources and bugfix. 2. Add nu_gpio_pin_get. 3. Add PM operator in USB host driver. 4. Support NUC980 stage 1 and add nk-980iot board.