x86/PCI: Convert pci_config_lock to raw_spinlock

pci_config_lock must be a real spinlock in preempt-rt. Convert it to
raw_spinlock. No change for !RT kernels.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
diff --git a/arch/x86/pci/common.c b/arch/x86/pci/common.c
index cf2e938..215a27a 100644
--- a/arch/x86/pci/common.c
+++ b/arch/x86/pci/common.c
@@ -76,7 +76,7 @@
  * This interrupt-safe spinlock protects all accesses to PCI
  * configuration space.
  */
-DEFINE_SPINLOCK(pci_config_lock);
+DEFINE_RAW_SPINLOCK(pci_config_lock);
 
 static int __devinit can_skip_ioresource_align(const struct dmi_system_id *d)
 {