[NUC980] NUC980 and Linux kernel v5.10

[morgandu]

Originally, the Buildroot for NUC980 used Linux kernel v4.4, but now it supports Linux kernel v5.10. This provides new options for applications requiring Linux v5. The updated Buildroot can be downloaded from GitHub.

The simple steps to build the environment:

• "git clone https://github.com/OpenNuvoton/MA35D1_Buildroot"
• "cd MA35D1_Buildroot" to change directory
• "make nuvoton_nuc980_iot_defconfig" for NuMaker-IIoT-NUC980 board or
• "make nuvoton_nuc980_chili_defconfig" for NuMaker-RTU-NUC980 (Chili) board, ...
• "make" to build the environment.