device_cgroup: add DEVCG_ prefix to ACC_* and DEV_* constants

device_cgroup: add DEVCG_ prefix to ACC_* and DEV_* constants

Rename device type and access type constants defined in
security/device_cgroup.c by adding the DEVCG_ prefix.

The reason behind this renaming is to make them global namespace
friendly, as they will be moved to the corresponding header file
by following patches.

Signed-off-by: Roman Gushchin <[email protected]>
Cc: David S. Miller <[email protected]>
Cc: Tejun Heo <[email protected]>
Cc: Alexei Starovoitov <[email protected]>
Cc: Daniel Borkmann <[email protected]>
Signed-off-by: David S. Miller <[email protected]>