[Buildroot] csky_gx6605s build failure

[Giulio Benetti]

Hi Guo,

I'm dealing with gitlab-ci failures, including csky_gx6605s_defconfig. 
What is missing is basically the toolchain. Buildroot can't build a 
tooclahin for C-Sky at the moment(we should wait until gcc 12 if it will 
keep ck610 variant). So my idea would be to add an external toolchain 
your company could provide with a stable URL to make this defconfig to 
build successfully instead of dropping it. And once gcc 12 is released 
and added to Buildroot we can drop the external toolchain and use the 
Buildroot's one.

What do you think?

Best regards
-- 
Giulio Benetti
Benetti Engineering sas