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>

src/soc/intel/apollolake/bootblock/cache_as_ram.S

@@ -25,10 +25,6 @@
 
 .global bootblock_pre_c_entry
 bootblock_pre_c_entry:
-	/*
-	 * eax:  BIST value
-	 */
-	movd	%eax, %mm2
 
 .global cache_as_ram
 cache_as_ram: