In Kconfig files, the 'if' and 'endif' statements need to match up. A
file can't start an if statement that's completed in the next file.
Add a check as the files are being parsed to make sure that they match
up correctly.
Change-Id: If51207ea037089ab84c768e5a868270468cf4c4f
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: https://review.coreboot.org/13876
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>