The module relocation handling code has inconsistent use of printk() and
pr_*() functions. Convert printk() calls to use pr_err() and pr_warn().

[paul.burton@imgtec.com: Do the same thing in module.c]
Signed-off-by: Steven J. Hill <sjhill@realitydiluted.com>
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: Andrey Konovalov <adech.fo@gmail.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/12433/Signed-off-by: Ralf Baechle <ralf@linux-mips.org>