OsmoBTS/abis/rsl: combine separate dyn ts sections
OsmoBTS/abis/rsl: combine separate dyn ts sections

There were two separate sections saying basically the same. Move the
entire 'Dynamic Channel Combinations' section further above and combine
with the 'IPA Style PDCH Management' section to avoid repetition.

Change-Id: Ic370ba34de5cb14f0194ff8c8661e45d7ca98e2b

osmocom/osmo-bts,osmocom/osmo-bts,osmocom/osmo-bts