Update Sparc32 and Sparc64 OpenBIOS image to SVN revision 157. Changes:

Update Sparc32 and Sparc64 OpenBIOS image to SVN revision 157. Changes:
r150: Try to fix system reset for SMP and SS-10 cases
r151: Fix obp_dumb_memalloc
r152: Fix mapping more than 2G memory
r153: Get a real memory allocator for Sparc, based on PPC ofmem
r154: Update totavail when memory is allocated by dumb memory allocator
r155: Fix pop_fstr_copy memory leaks
- console one prevented Debian 3.1r1 from installing in console=prom mode
- fixing this also needed the real malloc/free
r156: Hack for building on CIFS directory
r157: Allow boot start PC to be different from virtual location (boot mode)

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3029 c046a42c-6fe2-441c-8c8c-71466251a162