MIPS: BCM47XX: Include io.h directly and fix brace indent

We use IO functions like readl & ioremap_nocache, so include linux/io.h
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Cc: linux-mips@linux-mips.org
Cc: Hauke Mehrtens <hauke@hauke-m.de>
Patchwork: https://patchwork.linux-mips.org/patch/9650/Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/bcm47xx/nvram.c

@@ -11,6 +11,7 @@
  * option) any later version.
  */
 
+#include <linux/io.h>
 #include <linux/types.h>
 #include <linux/module.h>
 #include <linux/kernel.h>