mainboard/google/kahlee: Update SPD Makefile

The .spd.hex text is added to the name by the build process.  This
was causing a failure because we were trying to add the files:
'file.spd.hex.spd.hex' to the build.

Remove the additional .spd.hex text.

BUG=b:71535311
TEST=Build

Change-Id: I11df7a90c979503676a66c6502900a13f1a8e359
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: https://review.coreboot.org/23189
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Marc Jones <marc@marcjonesconsulting.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Chris Ching <chingcodes@chromium.org>

0 files changed, 0 insertions, 0 deletions