Some renaming so that future features will fit in better; If the architecture provides its only system logging (via CONFIG_ARCH_SYSLOG), then syslog_initialize() is stubbed out

Move RAMLOG initialize from up_initialilize.c files to syslog_initialize().  up_initialize.c files now call syslog_initialize() unconditionally

Some higher level SYSLOG features are disabled if the architecture-specific logic provides its own SYSLOG functionality

Add a hook before the existing syslog_initialize() call; rename the old syslog_initialize() to syslog_dev_initialize().

Move the OS intensive part of vsyslog and vlowsyslog to drivers/syslog/vsyslog.c and vlowsyslog.c.  Also move lib_syslogstrem to drivers/syslog/syslogstream.c

Upstream_nucleo 144

Upstream_nucleo 144