[ROCm][MLA][Bugfix] Reserve FP8 prefill workspace before lock for Kimi-K2.5 (#42978)
Signed-off-by: Xavier Aguilar <xavier.aguilarfruto@amd.com>
Co-authored-by: Douglas Lehr <91553416+dllehr-amd@users.noreply.github.com>
Co-authored-by: Andreas Karatzas <akaratza@amd.com>