mvebu: backport Turris Omnia DTS changes to 5.4

mvebu: backport Turris Omnia DTS changes to 5.4

Kernel 5.4 receives a reduced set, just to make the SFP cage work.
While we are at it, move the patches accepted upstream to the 0xx series.

Reviewed-by: Noci <noci@noci.work>
Reviewed-by: Justin van Steijn <jvs@fsfe.org>
Reviewed-by: Nico Rikken <nico@nicorikken.eu>
Reviewed-by: Julius Schwartzenberg <julius.schwartzenberg@gmail.com>
Signed-off-by: Klaus Kudielka <klaus.kudielka@gmail.com>
(cherry picked from commit 8138cb8737d1475e6e8d57393500f30384e75a82)