crosfirmware: Make script more silent

Remove debug output and parted messages.

Change-Id: I6416a88b5fdb4c92741439e9edb5f753f885cbe3
Signed-off-by: Joseph Pillow <joseph.a.pillow@gmail.com>
Reviewed-on: https://review.coreboot.org/14460
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>
1 file changed