media: atomisp: fix help message for ISP2401 selection

I'm pretty sure I named this right, but it sounds that I ended
doing something weird maybe while solving some conflict.

So, fix the title of this config var.
Signed-off-by: NMauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/staging/media/atomisp/Kconfig

@@ -22,7 +22,7 @@ config VIDEO_ATOMISP
 	  module will be called atomisp
 
 config VIDEO_ATOMISP_ISP2401
-	bool "VIDEO_ATOMISP_ISP2401"
+	bool "Use Intel Atom ISP on Cherrytail/Anniedale (ISP2401)"
 	depends on VIDEO_ATOMISP
 	help
 	  Enable support for Atom ISP2401-based boards.