amdgpu: revert back to older raven sdma firmware

amdgpu: revert back to older raven sdma firmware

Newer firmware seems to cause random stability issues that
are hard to reproduce reliably to root cause.  Revert
back to the older SDMA firmware until the issue is fixed.

From internal git commit:
2be8cd57dc8b84e38a05405958aff60c25c78747

Bug: https://bugs.launchpad.net/ubuntu/+source/linux-firmware/+bug/1928393
Bug: https://gitlab.freedesktop.org/mesa/mesa/-/issues/4699
Bug: https://bugzilla.kernel.org/show_bug.cgi?id=213391
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Josh Boyer <jwboyer@kernel.org>