soc/intel/apollolake: Do not re-save BIST result

soc/intel/apollolake: Do not re-save BIST result

BIST result is already stored by arch/x86/bootblock_ctr0.S in
mm0. Also, eax does not contain BIST result by the time control
reaches bootblock_pre_c_entry. bootblock_crt0.S saves timestamp in mm2
which was being overwritten here. Thus, remove the saving of BIST
result from SoC code.

Change-Id: I65444689cf104c59c84574019f5daf82aab10bc7
Signed-off-by: Furquan Shaikh <furquan@google.com>
Reviewed-on: https://review.coreboot.org/14381
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Andrey Petrov <andrey.petrov@intel.com>