Change in coreboot[master]: mb/intel/adlrvp_m: Add initial code for adl-m variant board

[Maulik V Vaghela (Code Review)]

Attention is currently required from: Varshit B Pandya, Francois Toguo Fotso, Sridhar Siricilla, Subrata Banik.
Maulik V Vaghela has uploaded a new patch set (#22) to the change originally created by Varshit B Pandya. ( https://review.coreboot.org/c/coreboot/+/49871 )

Change subject: mb/intel/adlrvp_m: Add initial code for adl-m variant board
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mb/intel/adlrvp_m: Add initial code for adl-m variant board

List of changes:
1. Add mainboard Kconfig to Kconfig.name files
2. Handle mainboard names in Kconfig file for adlrvp
3. Add override devicetree for ADL-M RVP.
4. Configure proper PCI and USB ports as per schematics for ADL-M
Since ADL-M RVP uses ADL-M PCH, There is difference in number of root
ports supported for each. Moving extra ports for ADL-P inside it's
overridetree.cb to prevent compilation error.

BUG=None
BRANCH=None
TEST=Able to build ADL-M RVP variants adlrvp_m and adlrvp_m_ext_ec.

Signed-0ff-by: Maulik Vaghela 
Signed-off-by: Varshit Pandya 
Change-Id: I997b89ba87fb03dfa6a836caec51efd05baa2e8d
---
M src/mainboard/intel/adlrvp/Kconfig
M src/mainboard/intel/adlrvp/Kconfig.name
A src/mainboard/intel/adlrvp/devicetree_m.cb
A src/mainboard/intel/adlrvp/variants/adlrvp_m/overridetree.cb
A src/mainboard/intel/adlrvp/variants/adlrvp_m_ext_ec/overridetree.cb
5 files changed, 319 insertions(+), 4 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/71/49871/22