Modify handle_category_key to handle both upper and lower case alphabets in the coreinfo payload. Change-Id: I3ccbf69e90ba7824ad6ec85d2ca59aa8f40b3006 Signed-off-by: Himanshu Sahdev <himanshusah@hcl.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/35538 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Patrick Georgi <pgeorgi@google.com>