soc/qualcomm: Increase SPI frequency to 75 MHz

Increase frequency of sc7280 to 75 MHz.  Setting the delay to 1/8 of
a cycle as a result of experimentation.

BUG=b:190231148
BRANCH=None
TEST=Make sure that herobrine board boots
     HW Engineer measured SPI frequency and verified running at 75 MHz

Signed-off-by: Shelley Chen <shchen@google.com>
Change-Id: I3cf5a7c85f12800a11ece397a354349f2a0a235f
Reviewed-on: https://review.coreboot.org/c/coreboot/+/64673
Reviewed-by: Julius Werner <jwerner@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

0 files changed, 0 insertions, 0 deletions