pci_regs: update to latest linux

this drops a duplicate definition of
PCI_EXT_CAP_ATS_SIZEOF

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

include/standard-headers/linux/pci_regs.h

@@ -678,7 +678,6 @@
 #define PCI_EXT_CAP_ID_MAX	PCI_EXT_CAP_ID_PTM
 
 #define PCI_EXT_CAP_DSN_SIZEOF	12
-#define PCI_EXT_CAP_ATS_SIZEOF	8
 #define PCI_EXT_CAP_MCAST_ENDPOINT_SIZEOF 40
 
 /* Advanced Error Reporting */