soc/intel/common: Move CSE RW into new FMAP region to optimize boot time

CSE RW blob which will be used by coreboot to update CSE's RW partition,
is packed part of FW_MAIN_A and FW_MAIN_B. This will increase the size of
FW_MAIN_A and FW_MAIN_B. So, accordingly load and hash calculation of
FW_MAIN_A (or FW_MAIN_B) increases during verstage. It increases the boot
time by around 300ms.

The patch address the boot time by pulling CSE RW blob outside of
FW_MAIN_A and FW_MAIN_B. So, it creates new FMAP region within
RW_SECTION_A and RW_SECTION_B and adds CSE RW blob in the new regions
(ME_RW_A and ME_RW_B) as a CBFS file.

Boot Time Measurement details when CSE RW blob is added in the
ME_RW_A and ME_RW_B.
 --------------------------------------------------------
| Platform |   Old Boot Time      |   New Boot Time      |
 --------------------------------------------------------
| JSL      |  1.3s                |   1.06s              |
 --------------------------------------------------------
| TGL      |  1.63s               |   1.36s              |
 --------------------------------------------------------

Changes:
 1. Makefile change to accommodate CSE RW blob into  ME_RW_A/ME_RW_B
 2. Kconfig change to define CBFS name and default file name for RW blob
    metadata.
 3. CSE Lite Driver

BUG=b:169077783
TEST=Verified on JSL & TGL platforms

Signed-off-by: Sridhar Siricilla <sridhar.siricilla@intel.com>
Change-Id: If043c9cb99fb822b62633591bf9c5bd75dfe8349
Reviewed-on: https://review.coreboot.org/c/coreboot/+/46312
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>

0 files changed, 0 insertions, 0 deletions