x86: vsmp fix x86 vsmp fix is vsmp box cleanup

code got a bit smaller:

arch/x86/kernel/vsmp_64.o:

   text	   data	    bss	    dec	    hex	filename
    205	      4	      0	    209	     d1	vsmp_64.o.before
    181	      4	      0	    185	     b9	vsmp_64.o.after
Signed-off-by: NIngo Molnar <mingo@elte.hu>

arch/x86/kernel/vsmp_64.c

@@ -120,10 +120,8 @@ int is_vsmp_box(void)
 		return vsmp;
 
 	/* Check if we are running on a ScaleMP vSMP box */
-	if ((read_pci_config_16(0, 0x1f, 0, PCI_VENDOR_ID) ==
-	     PCI_VENDOR_ID_SCALEMP) &&
-	    (read_pci_config_16(0, 0x1f, 0, PCI_DEVICE_ID) ==
-	    PCI_DEVICE_ID_SCALEMP_VSMP_CTL))
+	if (read_pci_config(0, 0x1f, 0, PCI_VENDOR_ID) ==
+	     (PCI_VENDOR_ID_SCALEMP | (PCI_DEVICE_ID_SCALEMP_VSMP_CTL << 16)))
 		vsmp = 1;
 
 	return vsmp;