ARM: dts: ls1021a: disable ifc node by default

Disable the bus in the SoC dtsi file to be enabled only in board dts
files. Also breakup long values in the ifc node to fix dtbs_check.

Signed-off-by: Li Yang <leoyang.li@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>