cpu/x86: Move some SMM function declarations

Change-Id: I9a4e57f8fd032f2824eab0e5b59d635710e3e24b
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/34822
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

src/arch/x86/acpi_s3.c

@@ -24,6 +24,7 @@
 #include <program_loading.h>
 #include <romstage_handoff.h>
 #include <symbols.h>
+#include <cpu/x86/smm.h>
 
 #if ENV_RAMSTAGE || ENV_POSTCAR
 

src/arch/x86/include/arch/cpu.h

@@ -203,12 +203,6 @@ static inline unsigned int cpuid_edx(unsigned int op)
 unsigned int cpu_cpuid_extended_level(void);
 int cpu_have_cpuid(void);
 
-/* Only with !PARALLEL_MP. */
-void smm_init(void);
-void smm_init_completion(void);
-
-void smm_setup_structures(void *gnvs, void *tcg, void *smi1);
-
 static inline bool cpu_is_amd(void)
 {
 	return CONFIG(CPU_AMD_AGESA) || CONFIG(CPU_AMD_PI)