nb/intel/sandybridge: Fix VBOOT
The VBOOT code can be compiled but it asserts with:
ASSERTION ERROR: file 'src/security/vboot/common.c', line 40
Start VBOOT in bootblock to fix the assertion.
Tested on Lenovo X220:
The assertion is gone, the platform boots again.
Change-Id: I48365e911b4f43aecba3b1f950178b7ceed5b2e9
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/39160
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>