parisc: pdt: Get prototype for arch_report_meminfo()

Include linux/proc_fs.h to avoid compiler warning about missing
prototype for 'arch_report_meminfo'
Signed-off-by: Helge Deller <deller@gmx.de>

arch/parisc/kernel/pdt.c

@@ -16,6 +16,7 @@
 #include <linux/memblock.h>
 #include <linux/seq_file.h>
 #include <linux/kthread.h>
+#include <linux/proc_fs.h>
 #include <linux/initrd.h>
 #include <linux/pgtable.h>
 #include <linux/mm.h>