exec/cpu-all.h: Get rid of obsolete CPULogItem type and functions.

Upstream has moved the log type definitions to "qemu/log.h" and
the implementation of qemu-log.c, which is now part of our build.

Update the caller to use the new versions which use QEMU/qemu_ as
the prefix, instead of CPU/cpu_.

Change-Id: Iec93d0a9e0b8430706d52cec79103f116f5f88b6
5 files changed