soc/intel/meteorlake: Enable VMX using coreboot CPU feature program

This function calls into `set_feature_ctrl_vmx_arg()`
to enable VMX for virtualization if not done by FSP (based on
DROP_CPU_FEATURE_PROGRAM_IN_FSP config is enabled) in MeteorLake
SoC based platform.

TEST=Able to build and boot google/rex.

Signed-off-by: Subrata Banik <subratabanik@google.com>
Change-Id: I7e49c15fd4f78a3e633855fea550720f0a685062
Reviewed-on: https://review.coreboot.org/c/coreboot/+/74161
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Kapil Porwal <kapilporwal@google.com>
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>

src/soc/intel/meteorlake/chip.h

@@ -350,6 +350,8 @@ struct soc_intel_meteorlake_config {
 	/* Energy-Performance Preference (HWP feature) */
 	bool enable_energy_perf_pref;
 	uint8_t energy_perf_pref_value;
+
+	bool disable_vmx;
 };
 
 typedef struct soc_intel_meteorlake_config config_t;

src/soc/intel/meteorlake/cpu.c

@@ -145,6 +145,9 @@ void soc_core_init(struct device *cpu)
 		disable_three_strike_error();
 
 		set_aesni_lock();
+
+		/* Enable VMX */
+		set_feature_ctrl_vmx_arg(CONFIG(ENABLE_VMX) && !conf->disable_vmx);
 	}
 }