Save the soc_id into a global struct. Change-Id: I2a0f04a09635086e3076a97b535df8a19d0693ce Signed-off-by: Zheng Bao <fishbaozi@gmail.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/72450 Reviewed-by: Fred Reitberger <reitbergerfred@gmail.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>