This patch fixes a bug in reading the 64 bit register reading
which was causing the total octets counters to show zero.
Now the code reads both the lower and higher 32 bits.
Tested in testpmd, byte values are correct.
Fixes: 805803445a ("e1000: support EM devices (also known as e1000/e1000e)")
Signed-off-by: Harry van Haaren <harry.van.haaren@intel.com>
Acked-by: Wenzhuo Lu <wenzhuo.lu@intel.com>