Update OpenBIOS/Sparc32 to SVN 144. Changes:
 - Fix power-management location
 - Fix out of bounds accesses
 - Increase virtual memory supply to meet NetBSD and OpenBSD demand
 - More obviously alarming return values for find_pte
 - Fix unaligned memory access
 - Fix memory corruption problems reported by glibc
 - Fix boot-device use
 - Use nvram boot-args and boot-device variables
 - Set variable defaults before nvram_init
 - Improve escape sequence handling
 - Fix nvram parameter area
 - More Sparc32 CPUs
 - Clear preloaded kernel parameters to avoid crash at reset


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2781 c046a42c-6fe2-441c-8c8c-71466251a162
