As the command to get version isn't supported on Picasso, we shouldn't
be exposing this into sysfs either.

Link: https://gitlab.freedesktop.org/drm/amd/-/issues/2449
Fixes: 7f1ea75d ("platform/x86/amd: pmc: Add sysfs files for SMU")
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Link: https://lore.kernel.org/r/20230409185348.556161-3-Shyam-sundar.S-k@amd.comReviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>