net: micrel: Fix set/get PHC time for lan8814

net: micrel: Fix set/get PHC time for lan8814

When setting or getting PHC time, the higher bits of the second time (>32
bits) they were ignored. Meaning that setting some time in the future like
year 2150, it was failing to set this.

The issue can be reproduced like this:

 # phc_ctl /dev/ptp1 set 10000000000
 phc_ctl[12.290]: set clock time to 10000000000.000000000 or Sat Nov 20 17:46:40 2286

 # phc_ctl /dev/ptp1 get
 phc_ctl[15.309]: clock time is 1410065411.018055420 or Sun Sep  7 04:50:11 2014

Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Reviewed-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Reviewed-by: Divya Koppera <divya.koppera@microchip.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/20240126073042.1845153-1-horatiu.vultur@microchip.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>