cpu/intel/common: Add set_feature_ctrl_vmx_arg()

Allow deciding whether to enable VMX through a function parameter. Used
in a follow-up.

Change-Id: I4f932de53207cd4e24cb4c67d20c60f708bfaa89
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/61505
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-by: Marvin Drees <marvin.drees@9elements.com>

src/cpu/intel/common/common.h

@@ -8,6 +8,7 @@
 
 void set_vmx_and_lock(void);
 void set_feature_ctrl_vmx(void);
+void set_feature_ctrl_vmx_arg(bool enable);
 void set_feature_ctrl_lock(void);
 
 /*