[pci] Remove drivers/pci/power.c

The old-school method of power management, using the pm_send() interface, is 
superceded by the centralized driver model, which handles walking the tree
and calling each device's suspend/resume methods. 

drivers/pci/Makefile

@@ -4,7 +4,6 @@
 
 obj-y		+= access.o bus.o probe.o remove.o pci.o pool.o quirks.o \
 			names.o pci-driver.o search.o pci-sysfs.o
-obj-$(CONFIG_PM)  += power.o
 obj-$(CONFIG_PROC_FS) += proc.o
 
 ifndef CONFIG_SPARC64