xen/pvhvm: Remove the xen_platform_pci int.

Since we have  xen_has_pv_devices,xen_has_pv_disk_devices,
xen_has_pv_nic_devices, and xen_has_pv_and_legacy_disk_devices
to figure out the different 'unplug' behaviors - lets
use those instead of this single int.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

arch/x86/xen/platform-pci-unplug.c

@@ -30,10 +30,9 @@
 #define XEN_PLATFORM_ERR_PROTOCOL -2
 #define XEN_PLATFORM_ERR_BLACKLIST -3
 
-/* store the value of xen_emul_unplug after the unplug is done */
-int xen_platform_pci_unplug;
-EXPORT_SYMBOL_GPL(xen_platform_pci_unplug);
 #ifdef CONFIG_XEN_PVHVM
+/* store the value of xen_emul_unplug after the unplug is done */
+static int xen_platform_pci_unplug;
 static int xen_emul_unplug;
 
 static int check_platform_magic(void)

include/xen/platform_pci.h

@@ -46,8 +46,6 @@ static inline int xen_must_unplug_disks(void) {
 #endif
 }
 
-extern int xen_platform_pci_unplug;
-
 #if defined(CONFIG_XEN_PVHVM)
 extern bool xen_has_pv_devices(void);
 extern bool xen_has_pv_disk_devices(void);