dt: dt-check-compatible: Find struct of_device_id instances with compiler annotations

The regex search for declarations of struct of_device_id was missing
cases that had a compiler annotation such as "__maybe_unused". Improve
the regex to allow for these. Use '\S' instead of specific characters to
shorten the regex. That also finds some more compatibles using '.'
characters.

Unfortunately, these changes add ~400 more compatibles without a
schema.
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20230804190130.1936566-1-robh@kernel.orgSigned-off-by: Rob Herring <robh@kernel.org>

scripts/dtc/dt-extract-compatibles

@@ -25,8 +25,8 @@ def parse_of_declare_macros(data):
 def parse_of_device_id(data):
 	""" Find all compatible strings in of_device_id structs """
 	compat_list = []
-	for m in re.finditer(r'of_device_id\s+[a-zA-Z0-9_]+\[\]\s*=\s*({.*?);', data):
-		compat_list += re.findall(r'\.compatible\s+=\s+"([a-zA-Z0-9_\-,]+)"', m[1])
+	for m in re.finditer(r'of_device_id(\s+\S+)?\s+\S+\[\](\s+\S+)?\s*=\s*({.*?);', data):
+		compat_list += re.findall(r'\.compatible\s+=\s+"(\S+)"', m[3])
 
 	return compat_list