linux-phytec-ti

ARM: dts: am437x-gp-evm: Enable wkup_m3 control of IO isolation

With this flag wkup_m3 is able to control IO isolation during
suspend on the board.

Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
Signed-off-by: Keerthy <j-keerthy@ti.com>