ACPI: Add and fill gnvs_ptr for smm_runtime

Change-Id: I823d04a4851437b4267a60886e5ab205bb2e1b10
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/42464
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>

src/include/cpu/x86/smm.h

@@ -61,6 +61,7 @@ struct smm_runtime {
 	u32 smm_size;
 	u32 save_state_size;
 	u32 num_cpus;
+	u32 gnvs_ptr;
 	/* STM's 32bit entry into SMI handler */
 	u32 start32_offset;
 	/* The apic_id_to_cpu provides a mapping from APIC id to CPU number.