ntdll: add initial support for OpenBSD to fill_cpu_info

[Austin English]

-- 
-Austin
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diff --git a/dlls/ntdll/nt.c b/dlls/ntdll/nt.c
index fdcc163..1abf6d8 100644
--- a/dlls/ntdll/nt.c
+++ b/dlls/ntdll/nt.c
@@ -1152,6 +1152,18 @@ void fill_cpu_info(void)
         get_cpuinfo( &cached_sci );
         NtCurrentTeb()->Peb->NumberOfProcessors = num;
     }
+#elif defined (__OpenBSD__)
+    {
+        int mib[2], num;
+        size_t len;
+
+        mib[0] = CTL_HW;
+        mib[1] = HW_NCPU;
+        len = sizeof(num);
+
+        num = sysctl(mib, 2, &num, &len, NULL, 0); 
+        NtCurrentTeb()->Peb->NumberOfProcessors = num;
+    }
 #elif defined (__APPLE__)
     {
         size_t valSize;