cpu/qemu-x86/cache_as_ram: Move guard

Although entry64.inc does guard against ENV_X86_64, it's more aesthetic
to have it with the other 64bit code below a guard just like other
platforms.

Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Change-Id: If3ef19dd6654cd2fa0be3c68dee4a472e7a7935d
Reviewed-on: https://review.coreboot.org/c/coreboot/+/80354
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
diff --git a/src/cpu/qemu-x86/cache_as_ram_bootblock.S b/src/cpu/qemu-x86/cache_as_ram_bootblock.S
index 0943e35..859b760 100644
--- a/src/cpu/qemu-x86/cache_as_ram_bootblock.S
+++ b/src/cpu/qemu-x86/cache_as_ram_bootblock.S
@@ -77,11 +77,11 @@
 	/* Align the stack and keep aligned for call to bootblock_c_entry() */
 	and	$0xfffffff0, %esp
 
+#if ENV_X86_64
 	/* entry64.inc preserves ebx. */
 #include <cpu/x86/64bit/entry64.inc>
 
 	/* Restore the BIST result and timestamps. */
-#if ENV_X86_64
 	movd	%mm2, %rdi
 	shlq	$32, %rdi
 	movd	%mm1, %rsi