Allow setting of number of raw devices as a module parameter

Allow setting of maximal number of raw devices as a module parameter. This
requires changing of static array into a vmalloced one (the array is going to
be too large for kmalloc).

Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig
index ad59b4e..49502bc 100644
--- a/drivers/char/Kconfig
+++ b/drivers/char/Kconfig
@@ -523,7 +523,7 @@
           with the O_DIRECT flag.
 
 config MAX_RAW_DEVS
-	int "Maximum number of RAW devices to support (1-8192)"
+	int "Maximum number of RAW devices to support (1-65536)"
 	depends on RAW_DRIVER
 	default "256"
 	help