davinci_emac: enable transmit time stamping.
davinci_emac: enable transmit time stamping.

This patch enables software (and phy device) transmit time stamping
for the DaVinci EMAC driver. Tested together with the dp83640 PHY.

Cc: Anant Gole <2a982fe81d2b073bd948ceadaa2a33c78eb6e0f0@ti.com>
Cc: Kevin Hilman <f9849b02abe18c1ece6bd40346458ed53f49d31b@deeprootsystems.com>
Signed-off-by: Richard Cochran <2eabbd0f89b6b46e7c9d3cb1c3b33a9d26b4d87d@omicron.at>
Signed-off-by: David S. Miller <fe08d3c717adf2ae63592e4c9aec6e3e404d8e3e@conan.davemloft.net>

KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs