soc/intel/quark: Drop BOOTBLOCK_SAVE_BIST_AND_TIMESTAMP

This was empty stub call doing nothing, to avoid targeting
non-existing MMX registers.

Change-Id: I78b83e6724159ea1eb0f8a0cf9d5b7ddfc9877b7
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/30390
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>

src/arch/x86/bootblock_crt0.S

@@ -44,23 +44,14 @@ debug_spinloop:
 
 bootblock_protected_mode_entry:
 
+#if !IS_ENABLED(CONFIG_USE_MARCH_586)
+	/* MMX registers required here */
+
 	/* BIST result in eax */
 	movl	%eax, %ebx
 
 	/* Get an early timestamp */
 	rdtsc
-
-#if IS_ENABLED(CONFIG_BOOTBLOCK_SAVE_BIST_AND_TIMESTAMP)
-	lea	1f, %ebp
-
-	/* eax: Low 32-bits of timestamp
-	 * ebx: BIST result
-	 * ebp: return address
-	 * edx: High 32-bits of timestamp
-	 */
-	jmp	bootblock_save_bist_and_timestamp
-1:
-#else
 	movd	%ebx, %mm0
 	movd	%eax, %mm1
 	movd	%edx, %mm2