ath9k: move PCI code into separate file

Now that we have converted all bus specific routines to replaceable, we
can move the PCI specific codes into a separate file.

Changes-licensed-under: ISC

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Signed-off-by: Imre Kaloz <kaloz@openwrt.org>
Tested-by: Pavel Roskin <proski@gnu.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath9k/Makefile b/drivers/net/wireless/ath9k/Makefile
index 1209d14..af3f39b 100644
--- a/drivers/net/wireless/ath9k/Makefile
+++ b/drivers/net/wireless/ath9k/Makefile
@@ -11,6 +11,7 @@
 		xmit.o \
 		rc.o
 
+ath9k-$(CONFIG_PCI) += pci.o
 ath9k-$(CONFIG_ATH9K_DEBUG) += debug.o
 
 obj-$(CONFIG_ATH9K) += ath9k.o