Fix another panic in bcw_phy_init() for sparc64.  Now firmware loads and radio initializes on sparc64, too.
Fix another panic in bcw_phy_init() for sparc64.  Now firmware loads
and radio initializes on sparc64, too.

orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars