linux-phytec-ti

net: hsr/prp: unify netlink socket interface

From the user interface point of view, hsr/prp device configuration
is similar. It accepts a pair of ethernet link and other parameters.
To help re-use the code, rename existing uapi inlcude file,
include/uapi/linux/hsr_netlink.h to include/uapi/linux/hsr_prp_netlink.h
and prefix the definitions with HSR_PRP to indicate they are applicable
for both. Also remove include/uapi/linux/prp_netlink.h in favour of the
above. While doing so, clean up the names used in include/uapi/linux/
if_link.h as well . For example, IFLA_HSR_MULTICAST_SPEC actually is
Least Significant Byte (LSB) of the Multicast address used for Supervision
frames and is configurable. So call it IFLA_HSR_PRP_SF_MC_ADDR_LSB instead
to make it explicit. Similarly, change IFLA_PRP_SUPERVISION_ADDR to
IFLA_HSR_PRP_SF_MC_ADDR.

By using the latest definitions, refactor code in hsr_netlink.c to a
common file, hsr_prp_netlink.h and call the functions from hsr_netlink.c
and prp_netlink.c thereby removing duplicate code.

Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>