doc:networking: Update comment for dev_id field in netdevice.h
doc:networking: Update comment for dev_id field in netdevice.h

This patch updates the comment for 'dev_id' field in
'include/linux/netdevice.h' to reflect the intended
usage of 'dev_id'.

References: http://marc.info/?l=linux-netdev&m=136992115300526&w=2
References: http://marc.info/?l=linux-netdev&m=137062569014612&w=2

Signed-off-by: Narendra K <3e1b9af82281c07078e70dee20e108bb96ed4416@dell.com>
Reviewed-by: Ben Hutchings <0672176982fbc629cc374f31a7a45ae1671abf90@solarflare.com>
Signed-off-by: David S. Miller <fe08d3c717adf2ae63592e4c9aec6e3e404d8e3e@davemloft.net>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs