staging/easycap: Fix thinko in "bars" module option description

Both bars=0 and bars=1 were described as meaning to display bars on
signal lost. Actually bars=1 means "display bars", but bars=0 means
display raw source as is (usually black screen).

Instead of changing bars=0 to "_no_ testcard bars ..." as suggested by
Dan Carpenter reword the whole bars description for clarity.

Cc: Mike Thomas <rmthomas@sciolus.org>
Cc: Dan Carpenter <error27@gmail.com>
Signed-off-by: Kirill Smelkov <kirr@mns.spb.ru>
Acked-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/easycap/README

@@ -60,8 +60,8 @@ Three module parameters are defined:
 
 debug      the easycap module is configured at diagnostic level n (0 to 9)
 gain       audio gain level n (0 to 31, default is 16)
-bars       0 =>  testcard bars when incoming video signal is lost
-           1 =>  testcard bars when incoming video signal is lost (default)
+bars       whether to display testcard bars when incoming video signal is lost
+           0 => no, 1 => yes (default)
 
 
 SUPPORTED TV STANDARDS AND RESOLUTIONS