kvm: Drop kvm_patch_opcode_byte (Jan Kiszka)

As cpu_memory_rw_debug is now capable of modifying ROM, we can drop our
own patch function.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6906 c046a42c-6fe2-441c-8c8c-71466251a162