[MIPS] cleanup WRPPMC include files

Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/gt64120/wrppmc/pci.c b/arch/mips/gt64120/wrppmc/pci.c
index 0d5289b..d06192f 100644
--- a/arch/mips/gt64120/wrppmc/pci.c
+++ b/arch/mips/gt64120/wrppmc/pci.c
@@ -8,9 +8,10 @@
  * for more details.
  */
 #include <linux/init.h>
+#include <linux/ioport.h>
 #include <linux/types.h>
 #include <linux/pci.h>
-#include <linux/kernel.h>
+
 #include <asm/gt64120.h>
 
 extern struct pci_ops gt64xxx_pci0_ops;