b43: Convert usage of b43_phy_mask()

This patch converts code to use the new b43_phy_mask() API.

The semantic patch that makes this change is as follows:

// <smpl>
@@
expression dev, addr, mask;
@@

-b43_phy_write(dev, addr, b43_phy_read(dev, addr) & mask);
+b43_phy_mask(dev, addr, mask);
// </smpl>

Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>