drm/i915: remove __i915_printk()

With the previous cleanups, the last remaining user of __i915_printk()
is i915_probe_error(). Switch that to use drm_dbg() and drm_err()
instead, dropping the request to report bugs in the few remaining
specific cases.

It's not common for drivers to log bug filing requests to begin with,
but these cases are in init, which is most likely to be tested in CI and
least likely to be hit by end users anyway.

Acked-by: Tvrtko Ursulin <tvrtko.ursulin@igalia.com>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Reviewed-by: Jonathan Cavitt <jonathan.cavitt@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/be9baeab281f75999e96cc7ad1c06c6680494bc1.1722951405.git.jani.nikula@intel.com


Signed-off-by: Jani Nikula <jani.nikula@intel.com>