drivers: net: can: Use interrupt type from device tree

Use proper interrupt type from the device tree for gpio interrupt
from CAN controller in qti-can driver as irq type may vary with
different targets.

Change-Id: If08c3f6d53fc6e8b7a55be47705c5a1841c0c913
Signed-off-by: Balachandra C S <balacs@codeaurora.org>