arm: dts: k3-j721e-sk: Remove OSPI phypattern partition

The phy calibration pattern partition isn't needed as the Cadence driver isn't
calibrating the phys.

Signed-off-by: Jonathan Humphreys <j-humphreys@ti.com>
Fixes: 58d61fb5 ("arm: dts: k3-j721e-sk: Add initial A72 specific dts support")