staging: rts5208: Resolve checkpatch.pl issues.

This patch removes unwanted use of dev_info for ftrace-like functionality
as suggested by checkpatch.pl.

Signed-off-by: Charlie Sands <sandsch@northvilleschools.net>
Link: https://lore.kernel.org/r/YjKimAdiRfRVfGl8@sckzor-linux.localdomain


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>