CPUTYPE: Fix Geode, remove C7

CPUTYPE: Fix Geode, remove C7

Upon further research, I determined that gcc44 doesn't specifically
support the C7 processor which was added yesterday.  It does support the
Geode processor, but the supported instruction sets weren't defined quite
right.

GCC 4.4 will not tune for the Atom nor Corei7 processors.  That support
isn't available until GCC 4.6.

Document: GCC 4.4.6 documentation
 Section: 3.  GCC Command options
    Para: 17. Hardware Models and Configurations
 Subpara: 15. Intel i386 and AMD x86_64 Options