ACPI: x86: s2idle: Fix a NULL pointer dereference

Ryzen 7000 (Raphael) introduced AMDI0008 for _HID.  This ID was added
in commit ed470feb ("ACPI: PM: s2idle: Add support for upcoming AMD
uPEP HID AMDI008"), but then removed in favor of aligning all new IDs
to Rembrandt support in commit fd894f05 ("ACPI: x86: s2idle: If a
new AMD _HID is missing assume Rembrandt").

Unfortunately there was a mistake in commit 100a5737 ("ACPI: x86:
s2idle: Move _HID handling for AMD systems into structures") that can
lead to a NULL pointer dereference accessing `dev_id->driver_data` in
the sentinel of `amd_hid_ids`.  Fix this dereference.

Reported-by: Richard Gong <Richard.Gong@amd.com>
Fixes: 100a5737 ("ACPI: x86: s2idle: Move _HID handling for AMD systems into structures")
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>