drivers/intel/fsp2_0: Add boot mode strings

The FSP boot mode showing in serial log is a magic number.
In order to let user understand its meaning directly, add
the strings to describe the modes.

TEST=build, boot the device and check the logs:
without this change, the log is like:
[SPEW ]  bootmode is set to: 2
with this change:
[SPEW ]  bootmode is set to: 2 (boot assuming no config change)

Change-Id: I49a409edcde7f6ccb95eafb0b250f86329817cba
Signed-off-by: Marx Wang <marx.wang@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/78683
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Eric Lai <ericllai@google.com>
Reviewed-by: Kapil Porwal <kapilporwal@google.com>
Reviewed-by: Subrata Banik <subratabanik@google.com>

0 files changed, 0 insertions, 0 deletions