Update to v3.18.21 kernel headers.
Change-Id: If068c58cfe6ac29fab76219dbe2eb5b11cf71246
diff --git a/original/uapi/linux/pci_regs.h b/original/uapi/linux/pci_regs.h
index 4a1d0cc..7dd8d80 100644
--- a/original/uapi/linux/pci_regs.h
+++ b/original/uapi/linux/pci_regs.h
@@ -319,6 +319,7 @@
#define PCI_MSIX_PBA 8 /* Pending Bit Array offset */
#define PCI_MSIX_PBA_BIR 0x00000007 /* BAR index */
#define PCI_MSIX_PBA_OFFSET 0xfffffff8 /* Offset into specified BAR */
+#define PCI_MSIX_FLAGS_BIRMASK PCI_MSIX_PBA_BIR /* deprecated */
#define PCI_CAP_MSIX_SIZEOF 12 /* size of MSIX registers */
/* MSI-X Table entry format */