x86/apic: Fix silent & fatal merge conflict in __generic_processor_info()

Fix up the silent merge conflict between commit c291b015 in x86/urgent
and commit f7c28833 in x86/apic which both remove num_processors++
from the original location and then add it at two different locations. As a
result num_processors is incremented twice which can cut the number of
available cpus in half.

Remove the one which is added by commit c291b015.

In hindsight I should have merged x86/urgent into x86/apic _before_ adding
the nodeid bits, but in hindsight we are always smarter.
Reported-and-tested-by: Borislav Petkov <bp@alien8.de>
Reported-by: Mike Galbraith <umgwanakikbuti@gmail.com>
Fixes: 1e1b3727 ("Merge branch 'x86/urgent' into x86/apic")
Link: https://lkml.kernel.org/r/alpine.DEB.2.20.1609261350090.5483@nanos
Cc: Dou Liyang <douly.fnst@cn.fujitsu.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

arch/x86/kernel/apic/apic.c

@@ -2171,8 +2171,6 @@ int __generic_processor_info(int apicid, int version, bool enabled)
 		return -ENOSPC;
 	}
 
-	num_processors++;
-
 	/*
 	 * Validate version
 	 */