staging: spectra: Kconfig: add missing '.'

All help messages end with full stop.
Signed-off-by: Andrea Gelmini <andrea.gelmini@gelma.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/spectra/Kconfig

@@ -5,7 +5,7 @@ menuconfig SPECTRA
 	default n
 	---help---
 	  Enable the FTL pseudo-filesystem used with the NAND Flash
-	  controller on Intel Moorestown Platform to pretend to be a disk
+	  controller on Intel Moorestown Platform to pretend to be a disk.
 
 choice
 	prompt "Compile for"