neutron requires more memory to support large size firmware, merge
dtcm and dtcm-ring buffer for larger contiguous memory.
Signed-off-by: Jiwei.Fu <jiwei.fu@nxp.com>
Reviewed-by: Forrest Shi <xuelin.shi@nxp.com>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Acked-by: Jason Liu <jason.hui.liu@nxp.com>