Makefile: Remove possibly illegal characters from doxyplatform

The CONFIG_MAINBOARD_PART_NUMBER string can have characters in it that
don't work in the doxyplatform make script under sh, so change any
non-alphanumeric characters to an underscore.

Also strip all the quotes - they aren't needed.

The spaces in the "QEMU x86 i440fx/piix4" platform are one example of
this.

Signed-off-by: Martin Roth <martin@coreboot.org>
Change-Id: I10bc6a8a245a34e89c859ff46835bde35aaa4286
Reviewed-on: https://review.coreboot.org/c/coreboot/+/46287
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Paul Fagerburg <pfagerburg@chromium.org>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>

0 files changed, 0 insertions, 0 deletions