fix file specification in comments

Many files include the filename at the beginning, serveral used a wrong one.

Signed-off-by: Uwe Zeisberger <Uwe_Zeisberger@digi.com>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
diff --git a/arch/arm/mach-sa1100/dma.c b/arch/arm/mach-sa1100/dma.c
index 3c6441d..2ea2a65 100644
--- a/arch/arm/mach-sa1100/dma.c
+++ b/arch/arm/mach-sa1100/dma.c
@@ -1,5 +1,5 @@
 /*
- * arch/arm/kernel/dma-sa1100.c
+ * arch/arm/mach-sa1100/dma.c
  *
  * Support functions for the SA11x0 internal DMA channels.
  *