ath9k: Code scrub

Merge core.c and base.c
Remove Antenna Diversity (unused now).
Remove unused chainmask handling code.
Comment, indentation scrub.

Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath9k/Makefile b/drivers/net/wireless/ath9k/Makefile
index c58cfde..c741e8d 100644
--- a/drivers/net/wireless/ath9k/Makefile
+++ b/drivers/net/wireless/ath9k/Makefile
@@ -9,7 +9,6 @@
 		main.o \
 		recv.o \
 		xmit.o \
-		rc.o \
-		core.o
+		rc.o
 
 obj-$(CONFIG_ATH9K) += ath9k.o