MIPS: rtlx: Remove KERN_DEBUG from pr_debug() arguments in rtlx.c

Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Cc: linux-kernel@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/7938/


Signed-off-by: Ralf Baechle <ralf@linux-mips.org>