RISC-V: sbcrv64_defconfig: enable FSCACHE

github workflow: enable spacemit

set base sbc-6.12.y for dorny/paths-filter

scripts: make_image.sh: remove obsolete apt-get fixup

Revert "RISC-V: Define pgprot_dmacoherent() for non-coherent devices"

This reverts commit 00b58d2.

Revert "RISC-V: Remove unnecessary include from compat.h"

This reverts commit 0d861bc.

This is the 6.12.95 stable release

This is the 6.6.144 stable release

github workflow: fix armhf build

This is the 6.1.177 stable release