rme: arrange to timestamp incoming frames a little more realistically.

git-svn-id: svn+ssh://ffado.org/ffado/trunk@2259 2be59082-3212-0410-8809-b0798e1608f0
rme: fix flash write function.  Fix input/output level identifiers stored in flash.  When setting up hardware, copy default sample rate into settings so it can be stored into flash (but still need to deal with the settings copy of the rate when the sample rate is changed).  Clean up some debug code.

git-svn-id: svn+ssh://ffado.org/ffado/trunk@2260 2be59082-3212-0410-8809-b0798e1608f0