mb/google/poppy: Add camera support

Add camera related support

* Enable the SA Imaging Unit and CIO2 devices.
* Enable TPS68470 PMIC and populate related ACPI objects.
* Enable OV cameras and populate related ACPI objects.
* Enable Dongwoon AF DAC and populate related ACPI objects.

BUG=b:36580624
BRANCH=none
TEST=Build and boot poppy. Dump and verify that ACPI tables
have the required entries for all the camera devices.

Change-Id: Ifbe878bb6b25fc976e935fee16c4d59fadd47fe2
Signed-off-by: Sowmya V <v.sowmya@intel.com>
Signed-off-by: Rizwan Qureshi <rizwan.qureshi@intel.com>
Reviewed-on: https://review.coreboot.org/18969
Tested-by: build bot (Jenkins)
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Sumeet R Pawnikar <sumeet.r.pawnikar@intel.com>
2 files changed