mb/google/cyan: Switch eMMC and SD from ACPI to PCI mode

Braswell boards don't work well with the eMMC and SD controller
in ACPI in payloads other than depthcharge - SeaBIOS requires
an onerous workaround (manually determining the PCI BAR0 address
for each eMMC and SD controller, then adding adding etc/sdcard
entries to the CBFS), and Tianocore can't see the devices at all.
To make the common use-case work better, switch to PCI mode.

Test: build/boot cyan variants with SeaBIOS and Tianocore
payloads, verify eMMC and SD card visible and bootable to
both payloads and OSes.

Change-Id: I71947603e22a37fe2c8ef4eaac8a3aa0d0ed1cec
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
---
M src/mainboard/google/cyan/devicetree.cb
1 file changed, 5 insertions(+), 5 deletions(-)