arch/x86/smbios.c: Trim some `len` variables
Reduce the scope or remove some `len` variables. This is done to ease
replacing `sizeof` on struct types in a follow-up commit, by ensuring
that all to-be-replaced appearances follow the variable declarations.
Change-Id: Ied38fcaf87ef5b1e4f93076b4ba2898ad1f98a72
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/55903
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>