drm/amdkfd: Allow device error to be logged

drm/amdkfd: Allow device error to be logged

The addition of a WARN_ON() check in order to return early in the
kq_initialize function retroactively causes the default case in the
following switch statement to never be executed, preventing dev_err
from logging device errors in the kernel. Both logs are now checked
in the default case.

Signed-off-by: Sunday Clement <Sunday.Clement@amd.com>
Reviewed-by: Harish Kasiviswanathan <Harish.Kasiviswanathan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>