driver: correct some problems reported by make checkpatch.

Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
6 jobs for 343-pci-driver-exception-when-signature-not-found in 19 minutes and 29 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Precheck
passed #47978
triggered
check_component

00:00:19

 
  Build
passed #47981
triggered
build_doc

00:00:34

passed #47980
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build_driver

00:00:17

passed #47979
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build_ip_and_tests

00:02:16

passed #47982
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build_linux_driver

00:00:22

 
  Test
passed #47983
triggered
test_ip_fast

00:15:38

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