cbfs/vboot: Adapt to new vb2_digest API

CL:3825558 changes all vb2_digest and vb2_hash functions to take a new
hwcrypto_allowed argument, to potentially let them try to call the
vb2ex_hwcrypto API for hash calculation. This change will open hardware
crypto acceleration up to all hash calculations in coreboot (most
notably CBFS verification). As part of this change, the
vb2_digest_buffer() function has been removed, so replace existing
instances in coreboot with the newer vb2_hash_calculate() API.

Due to the circular dependency of these changes with vboot, this patch
also needs to update the vboot submodule:

Updating from commit id 18cb85b5:
    2load_kernel.c: Expose load kernel as vb2_api

to commit id b827ddb9:
    tests: Ensure auxfw sync runs after EC sync

This brings in 15 new commits.

Signed-off-by: Julius Werner <jwerner@chromium.org>
Change-Id: I287d8dac3c49ad7ea3e18a015874ce8d610ec67e
Reviewed-on: https://review.coreboot.org/c/coreboot/+/66561
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Jakub Czapiga <jacz@semihalf.com>

src/include/cbfs_glue.h

@@ -5,6 +5,7 @@
 
 #include <commonlib/region.h>
 #include <console/console.h>
+#include <security/vboot/misc.h>
 #include <rules.h>
 
 /*
@@ -18,6 +19,7 @@
  */
 #define CBFS_ENABLE_HASHING (CONFIG(CBFS_VERIFICATION) && \
 			     (CONFIG(TOCTOU_SAFETY) || ENV_INITIAL_STAGE))
+#define CBFS_HASH_HWCRYPTO vboot_hwcrypto_allowed()
 
 #define ERROR(...) printk(BIOS_ERR, "CBFS ERROR: " __VA_ARGS__)
 #define LOG(...) printk(BIOS_INFO, "CBFS: " __VA_ARGS__)