raiden_debug_spi.c: Fix indents to be consistent

Change-Id: I414d6e5fcb590a006dd53fa93df80ec2a765c5d1
Signed-off-by: Edward O'Callaghan <quasisec@google.com>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/39308


Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>