xen/x2apic: Fix inconsistent indenting

Eliminate the follow smatch warning:

arch/x86/xen/enlighten_hvm.c:189 xen_cpu_dead_hvm() warn: inconsistent
indenting.
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Link: https://lore.kernel.org/r/20220207103506.102008-1-jiapeng.chong@linux.alibaba.comSigned-off-by: Juergen Gross <jgross@suse.com>

arch/x86/xen/enlighten_hvm.c

@@ -185,8 +185,7 @@ static int xen_cpu_dead_hvm(unsigned int cpu)
 
 	if (xen_have_vector_callback && xen_feature(XENFEAT_hvm_safe_pvclock))
 		xen_teardown_timer(cpu);
-
-       return 0;
+	return 0;
 }
 
 static bool no_vector_callback __initdata;