staging/nvec: fix compilation error in nvec.c

This fixes a compilation error in nvec.c due to the missing module.h include.
Signed-off-by: Marc Dietrich <marvin24@gmx.de>
Cc: Julian Andres Klode <jak@jak-linux.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/nvec/nvec.c

@@ -17,6 +17,7 @@
 /* #define DEBUG */
 
 #include <linux/kernel.h>
+#include <linux/module.h>
 #include <linux/atomic.h>
 #include <linux/clk.h>
 #include <linux/completion.h>