arm64: dts: ti: k3-am64-main: Add properties to support legacy interrupts

commit ac36a376e9c8430c83c3f8c034abbcea99f9497e from
git://git.ti.com/ti-linux-kernel/ti-linux-kernel.git



Add DT properties in PCIe DT node to support legacy interrupts.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Achal Verma <a-verma1@ti.com>
Link: https://serenity.dal.design.ti.com/patchwork/project/linux-patch-review/patch/20210330120812.23944-13-kishon@ti.com/


Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Signed-off-by: Xulin Sun <xulin.sun@windriver.com>