MIPS: Netlogic: Remove memory section from built-in DT

Do not pass a memory section in the built-in DTB, and let the
boot code use the values from the DRAM BARs.

Signed-off-by: Jayachandran C <jchandra@broadcom.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/5699/


Signed-off-by: Ralf Baechle <ralf@linux-mips.org>