uboot-phytec

arm: dts: k3-j721e: Declare 8 bit TX capability for OSPI

Now that OSPI support 8D-8D-8D (8 bit DDR cmd-addr-data), declare 8 bit
TX capability in DT.
Also update read-delay value to 0 like in kernel DT.

Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>