soc/intel/common/block: Add Intel common SPI support

SOC need to select specific macros need to compile
common SPI code.

Change-Id: I82f7d1852d12ca37f386b64a613a676753da959c
Signed-off-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-on: https://review.coreboot.org/22360
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
4 files changed