b43: Fix and update LP-PHY code

-Fix a few nasty typos (b43_phy_* operations instead of b43_radio_*)
 in the channel tune routines.
-Fix some typos & spec errors found by MMIO tracing.
-Optimize b43_phy_write & b43_phy_mask/set/maskset to use
 only the minimal number of MMIO accesses. (Write is possible
 using a single 32-bit MMIO write, while set/mask/maskset can
 be done in 3 16-bit MMIOs).
-Set the default channel back to 1, as the bug forcing us to use
 channel 7 is now fixed.

With this, the device comes up, scans, associates, transmits,
receives, monitors and injects on all channels - in other words,
it's fully functional. Sensitivity and TX power are still sub-optimal,
due to the lack of calibration (that's next on my list).

Signed-off-by: Gábor Stefanik <netrolller.3d@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/b43/phy_common.h

@@ -95,6 +95,8 @@ enum b43_txpwr_result {
  * 			Must not be NULL.
  * @phy_write:		Write to a PHY register.
  * 			Must not be NULL.
+ * @phy_maskset:	Maskset a PHY register, taking shortcuts.
+ *			If it is NULL, a generic algorithm is used.
  * @radio_read:		Read from a Radio register.
  * 			Must not be NULL.
  * @radio_write:	Write to a Radio register.
@@ -154,6 +156,7 @@ struct b43_phy_operations {
 	/* Register access */
 	u16 (*phy_read)(struct b43_wldev *dev, u16 reg);
 	void (*phy_write)(struct b43_wldev *dev, u16 reg, u16 value);
+	void (*phy_maskset)(struct b43_wldev *dev, u16 reg, u16 mask, u16 set);
 	u16 (*radio_read)(struct b43_wldev *dev, u16 reg);
 	void (*radio_write)(struct b43_wldev *dev, u16 reg, u16 value);