docs: mei.rst: fix a C expression markup
Sphinx 3.x doesn't allow expressions using :c:func markup: ./Documentation/driver-api/mei/mei.rst:41: WARNING: Unparseable C cross-reference: 'close(int fd)' Invalid C declaration: Expected end of definition. [error at 5] close(int fd) -----^ So, convert it into a :c:expr. Acked-by:Tomas Winkler <tomas.winkler@intel.com> Signed-off-by:
Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
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