arm64: dts: ti: k3-j7200-common-proc-board: add mcu cpsw nuss pinmux and phy defs

The TI j7200 EVM base board has TI DP83867 PHY connected to external CPSW
NUSS Port 1 in rgmii-rxid mode.

Hence, add pinmux and Ethernet PHY configuration for TI j7200 SoC MCU
Gigabit Ethernet two ports Switch subsystem (CPSW NUSS). It also enables
pps support for MCU CPSW CPTS by routing GenF1 output to MCU_CPTS_HW4_PUSH
input using timesync router.

Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>