mb/sifive/sifive-unmatched: add support for spi1 x4 mode

Tested on an unmatched, both SPI1 x1 and x4
work now.

Change-Id: Ida7f195eb6e4fc85018ceb83cf317595127c4af5
Signed-off-by: Ronald G Minnich <rminnich@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/81031
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Philipp Hug <philipp@hug.cx>
Reviewed-by: Felix Singer <service+coreboot-gerrit@felixsinger.de>

0 files changed, 0 insertions, 0 deletions