[POWERPC] spufs: Make file-internal functions & variables static

There are a few symbols used only in one file within spufs; this change
makes them static where suitable.

Signed-off-by: Sebastian Siewior <sebastian@breakpoint.cc>
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/powerpc/platforms/cell/spufs/file.c b/arch/powerpc/platforms/cell/spufs/file.c
index 4100ddc..a4a8770 100644
--- a/arch/powerpc/platforms/cell/spufs/file.c
+++ b/arch/powerpc/platforms/cell/spufs/file.c
@@ -199,9 +199,9 @@
 }
 
 #ifdef CONFIG_SPU_FS_64K_LS
-unsigned long spufs_get_unmapped_area(struct file *file, unsigned long addr,
-				      unsigned long len, unsigned long pgoff,
-				      unsigned long flags)
+static unsigned long spufs_get_unmapped_area(struct file *file,
+		unsigned long addr, unsigned long len, unsigned long pgoff,
+		unsigned long flags)
 {
 	struct spu_context	*ctx = file->private_data;
 	struct spu_state	*csa = &ctx->csa;