arm64: dts: ti: k3-j784s4-main: Add node for EHRPWMs

commit 7e16fd50b03e3ce4c1eadbfe1e6997d2d2f7b787 from
git://git.ti.com/ti-linux-kernel/ti-linux-kernel.git



Add dts nodes for 6 EHRPWM instances on SoC.

Signed-off-by: Dasnavis Sabiya <sabiya.d@ti.com>
Signed-off-by: Xulin Sun <xulin.sun@windriver.com>