driver: add measurement of write access time to userspace test application.

Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
4 jobs for master-wr-test in 11 minutes and 58 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Build
passed #27463
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build_driver

00:00:16

passed #27462
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build_ip_and_tests

00:01:06

passed #27464
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build_linux_driver

00:00:16

 
  Test
passed #27465
triggered
test_ip_fast

00:10:18

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