ARM: dts: dra72-evm: Mark uart1 rxd as wakeup capable

Uart1 rxd  is wakeup capable on DRA72 EVM. Hence, mark rxd line as
wakeup capable. This is similar to commit 66b04369 ("ARM: dts:
dra7-evm: Mark uart1 rxd as wakeup capable") for DRA74 EVM.

Signed-off-by: Vignesh R <vigneshr@ti.com>
Acked-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>