board: phycore_imx8mp: enable setting 2GHz timings without RAM size

make it possible to set the RAM timing frequency statically independent
from the RAM size. Fixed RAM timing frequency can be used while the
RAM size is still determined by the EEPROM image.

Signed-off-by: Benjamin Hahn <B.Hahn@phytec.de>
Signed-off-by: Teresa Remmet <t.remmet@phytec.de>
2 files changed