dts: arm: nxp: Move static ocram configuration to specific soc

RT1160 and RT1170 have different sizes for OCRAM1 and OCRAM2 this PR moves
the static ocram1 and ocram2 labels to the soc specific dtsi and defines
their sizes according to the RM. For RT1160, it combines the OCRAM1,
OCRAM2, and OCRAM M7 (FlexRAM ECC) into 1 node for a better user
experience. 256KB total as opposed to 64KB.

Signed-off-by: Jacob Wienecke <jacob.wienecke@nxp.com>