The Makefile already had a hipblas branch, but no CI row built it and
the gallery's `amd:` mapping stayed commented out. On an AMD host the
capability lookup found no `amd` key and fell back to `default`, so
these users silently ran the CPU build.
Add the hipblas row to the backend matrix and the two gallery entries
it publishes, then point `amd:` at them.
Drop `-DGGML_HIPBLAS=ON` while here. `SD_HIPBLAS` sets `GGML_HIP`
itself, and `GGML_HIPBLAS` is the name ggml used before the rename, so
the flag only produced an unused-variable warning. Add gfx1151 to the
local target list to match the value the workflows pass in.
Assisted-by: Claude Code:claude-opus-5[1m]
Signed-off-by: Ettore Di Giacinto <mudler@localai.io>
Co-authored-by: Ettore Di Giacinto <mudler@localai.io>