soc/intel/xeon_sp/spr: Drop microcode constraints

soc/intel/xeon_sp/spr: Drop microcode constraints

For current generation SPR/EMR you need to add at least
3 different microcodes having about 2MiB of size in total.
This doesn't work with the hardcoded offset and size in Kconfig.

Since it's loaded through FIT there's no need to pass it to FSP-T.
Drop the hardcoded locations and place it somewhere in CBFS.

Test: Booted on ibm/sbp1 with microcode confirmed loaded in
      bootblock on BSP. All the APs also have the correct
      microcode version loaded.
TEST= Build and boot on intel/archercity CRB
      'cat /proc/cpuinfo | grep microcode' result doesn't change
      before and after this patch.

Change-Id: Iaa7007c2b11a860c9c664a7e753440bad7fe858e
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/81635
Reviewed-by: Sumeet R Pawnikar <sumeet.r.pawnikar@intel.com>
Reviewed-by: Paul Menzel <paulepanter@mailbox.org>
Reviewed-by: Lean Sheng Tan <sheng.tan@9elements.com>
Reviewed-by: Jincheng Li <jincheng.li@intel.com>
Reviewed-by: Shuo Liu <shuo.liu@intel.com>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>