drivers: net: can: Add K61 CAN controller driver

This driver creates Network device of type CAN
and processes tx and rx frames that it sends and
receives over SPI protocol.

Change-Id: I54a8665d1b9eda7e9b1ff695bd67de312c410195
Signed-off-by: Gustavo Solaira <gustavos@codeaurora.org>
Signed-off-by: Abinaya P <abinayap@codeaurora.org>