drivers: net: can: increase the delay value for controller boot-up

In certain targets, K61 controller takes around 1.25 msecs to come up.
Increase the delay value in the probe to successfully register for
CAN controller.

CRs-Fixed: 2074505
Change-Id: I6d89988b556cbf3ff7d2b950eee871c2c731153c
Signed-off-by: Abinaya P <abinayap@codeaurora.org>