xen: rename pciback module to xen-pciback.

pciback is rather generic for a modular distro style kernel.
Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>

drivers/xen/xen-pciback/Makefile

-obj-$(CONFIG_XEN_PCIDEV_BACKEND) += pciback.o
+obj-$(CONFIG_XEN_PCIDEV_BACKEND) += xen-pciback.o
 
-pciback-y := pci_stub.o pciback_ops.o xenbus.o
-pciback-y += conf_space.o conf_space_header.o \
-	     conf_space_capability.o \
-	     conf_space_capability_vpd.o \
-	     conf_space_capability_pm.o \
-             conf_space_quirks.o
-pciback-$(CONFIG_PCI_MSI) += conf_space_capability_msi.o
-pciback-$(CONFIG_XEN_PCIDEV_BACKEND_VPCI) += vpci.o
-pciback-$(CONFIG_XEN_PCIDEV_BACKEND_SLOT) += slot.o
-pciback-$(CONFIG_XEN_PCIDEV_BACKEND_PASS) += passthrough.o
-pciback-$(CONFIG_XEN_PCIDEV_BACKEND_CONTROLLER) += controller.o
+xen-pciback-y := pci_stub.o pciback_ops.o xenbus.o
+xen-pciback-y += conf_space.o conf_space_header.o \
+		 conf_space_capability.o \
+		 conf_space_capability_vpd.o \
+		 conf_space_capability_pm.o \
+		 conf_space_quirks.o
+xen-pciback-$(CONFIG_PCI_MSI) += conf_space_capability_msi.o
+xen-pciback-$(CONFIG_XEN_PCIDEV_BACKEND_VPCI) += vpci.o
+xen-pciback-$(CONFIG_XEN_PCIDEV_BACKEND_SLOT) += slot.o
+xen-pciback-$(CONFIG_XEN_PCIDEV_BACKEND_PASS) += passthrough.o
+xen-pciback-$(CONFIG_XEN_PCIDEV_BACKEND_CONTROLLER) += controller.o
 
 ifeq ($(CONFIG_XEN_PCIDEV_BE_DEBUG),y)
 EXTRA_CFLAGS += -DDEBUG