compat: backport eth_random_addr()

compat: backport eth_random_addr()

This really was a rename but to make code simpler just
reimplement this for all kernels.

commit 0a4dd594982a321699000218715e28664ec49169
Author: Joe Perches <joe@perches.com>
Date:   Thu Jul 12 19:33:05 2012 +0000

    etherdevice: Rename random_ether_addr to eth_random_addr

    Add some API symmetry to eth_broadcast_addr and
    add a #define to the old name for backward compatibility.

    Signed-off-by: Joe Perches <joe@perches.com>
    Signed-off-by: David S. Miller <davem@davemloft.net>
mcgrof@tux ~/compat (git::master)$ ckmake -t
Trying kernel 3.4.0-030400rc1-generic [OK]
Trying kernel 3.3.7-030307-generic [OK]
Trying kernel 3.2.2-030202-generic [OK]
Trying kernel 3.1.10-030110-generic [OK]
Trying kernel 3.0.18-030018-generic [OK]
Trying kernel 2.6.39-02063904-generic [OK]
Trying kernel 2.6.38-02063808-generic [OK]
Trying kernel 2.6.37-02063706-generic [OK]
Trying kernel 2.6.36-02063604-generic [OK]
Trying kernel 2.6.35-02063512-generic [OK]
Trying kernel 2.6.34-02063410-generic [OK]
Trying kernel 2.6.33-02063305-generic [OK]
Trying kernel 2.6.32-02063255-generic [OK]
Trying kernel 2.6.31-02063113-generic [OK]
Trying kernel 2.6.30-02063010-generic [OK]
Trying kernel 2.6.29-02062906-generic [OK]
Trying kernel 2.6.28-02062810-generic [OK]
Trying kernel 2.6.27-020627-generic [OK]
Trying kernel 2.6.26-020626-generic [OK]
Trying kernel 2.6.25-020625-generic [OK]
Trying kernel 2.6.24-020624-generic [OK]

real    4m25.765s
user    9m56.460s
sys     1m24.650s

real    2m7.808s
user    3m20.640s
sys     0m40.520s

Signed-off-by: Luis R. Rodriguez <mcgrof@frijolero.org>