dres0280_rev_a: RAM and serial-Post

known issues: missing mux configuration

Signed-off-by: Eik Binschek <binschek@dresearch-fe.de>
add DDR3-RAM mux settings

Signed-off-by: Eik Binschek <binschek@dresearch-fe.de>
dres0280_rev_a: renove wrong initialisation

renove wrong initialisation

Signed-off-by: Eik Binschek <binschek@dresearch-fe.de>
Merge commit '98cc7c80fe7e69854ab7c1afd824843bc3601254' into mainline
Merge commit '2b13f31de924f44d7e02e98becaaf9294188d2f6' into mainline
Merge commit '2ce364bb7fe8d6d46415792ec327c7d0694e5b83' into mainline
dres0280_rev_a: copy main source from mx6qsabrelite

copy main source from mx6qsabrelite to dres0280_rev_a

Signed-off-by: Eik Binschek <binschek@dresearch-fe.de>