ARM: dts: am335x-evm: Enable DCAN1

DCAN1 is routed to CAN port (J11) when profile 1 is selected.
As DCAN1 pins (i.e. uart0_ctsn and uart0_rtsn) are not used
in any other profile it doesn't harm to always have DCAN1
enabled.

Signed-off-by: Roger Quadros <rogerq@ti.com>