ARM: dts: imx6dl: Pass the reg properties for mipi nodes

Pass the reg properties for mipi nodes in order to fix the
following build warnings with W=1:

arch/arm/boot/dts/imx6dl-apf6dev.dtb: Warning (unit_address_vs_reg): Node /soc/aips-bus@2100000/mipi@21dc000/port@1/endpoint@0 has a unit name, but no reg property
arch/arm/boot/dts/imx6dl-apf6dev.dtb: Warning (unit_address_vs_reg): Node /soc/aips-bus@2100000/mipi@21dc000/port@1/endpoint@1 has a unit name, but no reg property
arch/arm/boot/dts/imx6dl-apf6dev.dtb: Warning (unit_address_vs_reg): Node /soc/aips-bus@2100000/mipi@21dc000/port@2/endpoint@0 has a unit name, but no reg property
arch/arm/boot/dts/imx6dl-apf6dev.dtb: Warning (unit_address_vs_reg): Node /soc/aips-bus@2100000/mipi@21dc000/port@2/endpoint@1 has a unit name, but no reg property
arch/arm/boot/dts/imx6dl-apf6dev.dtb: Warning (unit_address_vs_reg): Node /soc/aips-bus@2100000/mipi@21dc000/port@3/endpoint@0 has a unit name, but no reg property
arch/arm/boot/dts/imx6dl-apf6dev.dtb: Warning (unit_address_vs_reg): Node /soc/aips-bus@2100000/mipi@21dc000/port@3/endpoint@1 has a unit name, but no reg property
arch/arm/boot/dts/imx6dl-apf6dev.dtb: Warning (unit_address_vs_reg): Node /soc/aips-bus@2100000/mipi@21dc000/port@4/endpoint@0 has a unit name, but no reg property
arch/arm/boot/dts/imx6dl-apf6dev.dtb: Warning (unit_address_vs_reg): Node /soc/aips-bus@2100000/mipi@21dc000/port@4/endpoint@1 has a unit name, but no reg property

Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>