According to ACPI 6.4, 6.1.5 _HID states:
- A valid PNP ID must be of the form "AAA####" where A is an uppercase
letter and # is a hex digit.
- A valid ACPI ID must be of the form "NNNN####" where N is an uppercase
letter or a digit ('0'-'9') and # is a hex digit.
Signed-off-by: Joey Gouly <joey.gouly@arm.com>
Reviewed-by: Sami Mujawar <sami.mujawar@arm.com>