cpu/x86/smm_module_hander: Set up a save state map

With the smm_module_loaderv2 the save state map is not linear so copy
a map from ramstage into the smihandler.

TESTED on QEMU q35: Both SMMLOADER V1 and V2 handle save states properly.

Change-Id: I31c57b59559ad4ee98500d83969424e5345881ee
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/50769
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

src/include/cpu/x86/smm.h

@@ -60,6 +60,7 @@ struct smm_runtime {
 	u32 save_state_size;
 	u32 num_cpus;
 	u32 gnvs_ptr;
+	uintptr_t save_state_top[CONFIG_MAX_CPUS];
 } __packed;
 
 struct smm_module_params {