Change in coreboot[master]: drivers/efi: Add EFI variable store option support

[Angel Pons (Code Review)]

Attention is currently required from: Sean Rhodes, Martin Roth, Patrick Rudolph, Matt DeVillier, Arthur Heymans.
Angel Pons has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/52564 )

Change subject: drivers/efi: Add EFI variable store option support
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Patch Set 10:

(1 comment)

File src/drivers/efi/Kconfig:

https://review.coreboot.org/c/coreboot/+/52564/comment/054db11f_3443d85a 
PS10, Line 1: DRIVERS_EFI_VARIABLE_STORE
> yes, it needs to bind against UDK as the Makefile.inc sets the header include directory. […]

Including multiple UDK could result in conflicts. I meant including directly as in specifying the full path to the edk2 headers. However, if those edk2 headers chain-include more headers, they may not be found in the include path...