x86/paravirt: Move the Xen-only pv_cpu_ops under the PARAVIRT_XXL umbrella

Most of the paravirt ops defined in pv_cpu_ops are for Xen PV guests
only. Define them only if CONFIG_PARAVIRT_XXL is set.

Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: xen-devel@lists.xenproject.org
Cc: virtualization@lists.linux-foundation.org
Cc: akataria@vmware.com
Cc: rusty@rustcorp.com.au
Cc: boris.ostrovsky@oracle.com
Cc: hpa@zytor.com
Link: https://lkml.kernel.org/r/20180828074026.820-13-jgross@suse.com

arch/x86/include/asm/processor.h

@@ -578,7 +578,7 @@ static inline bool on_thread_stack(void)
 			       current_stack_pointer) < THREAD_SIZE;
 }
 
-#ifdef CONFIG_PARAVIRT
+#ifdef CONFIG_PARAVIRT_XXL
 #include <asm/paravirt.h>
 #else
 #define __cpuid			native_cpuid
@@ -589,7 +589,7 @@ static inline void load_sp0(unsigned long sp0)
 }
 
 #define set_iopl_mask native_set_iopl_mask
-#endif /* CONFIG_PARAVIRT */
+#endif /* CONFIG_PARAVIRT_XXL */
 
 /* Free all resources held by a thread. */
 extern void release_thread(struct task_struct *);