debugger: changed dprintcalls argument to limit number of displayed calls;...

debugger: changed dprintcalls argument to limit number of displayed calls; fixed log function in custom ports to no longer cause compilation errors

Change-Id: I234ee29060574fe5ff3de50d717b209899f5d2e9
Signed-off-by: Botond Baranyi <botond.baranyi@ericsson.com>