b43: Move code from nphy.* to phy_n.*

Sourcecode files for PHY code are named by phy_XXX.{c,h}
where XXX is the PHY type.
Move the N-PHY code to match the other files.

Signed-off-by: Michael Buesch <[e-mail]>
Signed-off-by: John W. Linville <[e-mail]>

drivers/net/wireless/b43/Makefile

···
 b43-y				+= phy_common.o
 b43-y				+= phy_g.o
 b43-y				+= phy_a.o
-b43-$(CONFIG_B43_NPHY)		+= nphy.o
+b43-$(CONFIG_B43_NPHY)		+= phy_n.o
 b43-y				+= sysfs.o
 b43-y				+= xmit.o
 b43-y				+= lo.o

drivers/net/wireless/b43/main.c

···
 #include "debugfs.h"
 #include "phy_common.h"
 #include "phy_g.h"
-#include "nphy.h"
+#include "phy_n.h"
 #include "dma.h"
 #include "pio.h"
 #include "sysfs.h"

drivers/net/wireless/b43/nphy.c drivers/net/wireless/b43/phy_n.c

···
 #include <linux/types.h>
 
 #include "b43.h"
-#include "nphy.h"
+#include "phy_n.h"
 #include "tables_nphy.h"
 
 

drivers/net/wireless/b43/phy_common.c

···
 #include "phy_common.h"
 #include "phy_g.h"
 #include "phy_a.h"
-#include "nphy.h"
+#include "phy_n.h"
 #include "b43.h"
 #include "main.h"
 

drivers/net/wireless/b43/tables_nphy.c

···
 #include "b43.h"
 #include "tables_nphy.h"
 #include "phy_common.h"
-#include "nphy.h"
+#include "phy_n.h"
 
 
 struct b2055_inittab_entry {