Merge and move Spreadtrum patches from these kernels to shared-patches:
* linux-finepower-f1
* linux-samsung-{gtel3g,gtelwifi,j1mini3g,j3xnlte}
* linux-zte-p731a20
[ci:skip-build]: already built successfully in CI
Prepare for better device categorization by moving everything to testing
subdir first.
[skip-ci]: chicken-egg problem: passing pmaports CI depends on pmbootstrap MR
depends on this MR
Related: postmarketos#16