Move reset_vcpu to common. Original x86 reset_vcpu
takes an extra parameter to handle both reset and init reset.
Common API hides this detail and let arch specific code handle
this.
This patch also renames x86 specific vcpu_reset_internal to
x86_vcpu_reset_internal.
Tracked-On: #8830
Signed-off-by: Yifan Liu <yifan1.liu@intel.com>
Reviewed-by: Fei Li <fei1.li@intel.com>
Acked-by: Wang Yu1 <yu1.wang@intel.com>