canutils: add iproute2 to configure CAN interface

Previously ip tool from busybox was failing to configure
CAN interface. Added iproute2 in RDEPENDS so that it
can be used to configure CAN interface.

JIRA: http://jira.alm.mentorg.com:8080/browse/SB-3667

Signed-off-by: Yasir-Khan <yasir_khan@mentor.com>
Merge pull request #349 from Yasir-Khan/canutils

canutils: add iproute2 to configure CAN interface