staging: Add missing newline at end of file

"git diff" says:

    \ No newline at end of file

after modifying the files.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/mt7621-dts/TODO

@@ -2,4 +2,4 @@
 - ensure all usage matches code
 - ensure all features used are documented
 
-Cc: NeilBrown <neil@brown.name>
\ No newline at end of file
+Cc: NeilBrown <neil@brown.name>

drivers/staging/rts5208/TODO

@@ -4,4 +4,4 @@ TODO:
 - We will use the stack in drivers/mmc to implement
   rts5208/5288 in the future
 
-Micky Ching <micky_ching@realsil.com.cn>
\ No newline at end of file
+Micky Ching <micky_ching@realsil.com.cn>

drivers/staging/vt6655/test

@@ -6,4 +6,4 @@ KSP :=  /lib/modules/$(shell uname -r)/build \
 #	/usr/src/linux-$(shell uname -r | sed 's/\([0-9]*\.[0-9]*\)\..*/\1/') \
 #	/usr/src/linux   /home/plice
 test_dir = $(shell [ -e $(dir)/include/linux ] && echo $(dir))
-KSP := $(foreach dir, $(KSP), $(test_dir))
\ No newline at end of file
+KSP := $(foreach dir, $(KSP), $(test_dir))