drivers: net: can: Inform power states to k61 controller

K61 controller needs to be aware of host power state to decide
if timestamp message can be sent to host or not and also modify
irq type to be read from device tree as irq type may vary among
different targets.

Change-Id: I9ad8acc02ad6509579e78c87aaa3b4b15561c139
Signed-off-by: Balachandra C S <balacs@codeaurora.org>