soc/intel/common/block/cse: Add boot partition related APIs

The CSE region is logically divided into 3 boot partitions when
redundancy is enabled. These boot partitions are represented by BP1,
BP2 and BP3. In chrome, CSE can boot from either BP1 or BP2.
The CSE image layout appears as below..
    -------------    ------------------    --------------------------
    |CSE REGION | => | RO |    RW     | => | BP1 | BP2 + BP3 + DATA |
    -------------    ------------------    --------------------------

In order to support CSE FW update to RW region, below APIs help coreboot
to get info about the boot partitions, and allows the coreboot to set CSE
to boot from required boot partition(either BP1(RO) or BP2).

GET_BOOT_PARTITION_INFO - provides info on available partitions in the CSE
region. The API provides info on boot partitions like start/end offsets
of a partition within CSE region, and their version and partition status.

SET_BOOT_PARTITION_INFO - Sets the next boot partition to boot for CSE.
With the HECI API, firmware can notify CSE to boot from BP1 or BP2 on next
boot.

BUG=b:145809764

Change-Id: Iaa62409c0616d5913d21374a8a6804f82258eb4f
Signed-off-by: Rizwan Qureshi <rizwan.qureshi@intel.com>
Signed-off-by: Sridhar Siricilla <sridhar.siricilla@intel.com>
---
M src/soc/intel/common/block/cse/Makefile.inc
A src/soc/intel/common/block/cse/cse_bp.c
M src/soc/intel/common/block/include/intelblocks/cse.h
3 files changed, 492 insertions(+), 1 deletion(-)