mainboard/google/kahlee: Use 66MHz SPI clock for fast read

Looking at the 100MHz signal, we were violating the timing requirements.
66MHz still isn't great, but it's a good tradeoff between improving
the signal and losing boot speed time.

This slows down the boot time by about 20mS.

BUG=b:109583457
TEST=Boot grunt, look at signal on scope

Change-Id: I7ce70c992822dd17c5877226e74c1890660768c6
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: https://review.coreboot.org/26950
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Raul Rangel <rrangel@chromium.org>

0 files changed, 0 insertions, 0 deletions