staging: rtl8192e: Remove ftrace-like logging in rtl_dm.c

Remove "Unnecessary ftrace-like logging" as requested by checkpatch.
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Link: https://lore.kernel.org/r/bc0e2c9551ccf78fe388b27d18576b5bb195e2f7.1663387785.git.philipp.g.hortmann@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>