can: dev: move driver related infrastructure into separate subdir

stable inclusion
from stable-v4.19.299
commit 4757b5ea2441c7018ba756de4d9b2c3c6f59978d
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I8MCB5
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=4757b5ea2441c7018ba756de4d9b2c3c6f59978d



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[ Upstream commit 3e77f70e ]

This patch moves the CAN driver related infrastructure into a separate subdir.
It will be split into more files in the coming patches.

Reviewed-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
Link: https://lore.kernel.org/r/20210111141930.693847-3-mkl@pengutronix.de


Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Stable-dep-of: fe5c9940dfd8 ("can: dev: can_restart(): don't crash kernel if carrier is OK")
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com>