Input: add help entry for FM801 gameport driver to Kconfig

Signed-off-by: Dmitry Torokhov <[e-mail]>

drivers/input/gameport/Kconfig

···
 config GAMEPORT_FM801
 	tristate "ForteMedia FM801 gameport support"
 	depends on PCI
+	help
+	  Say Y here if you have ForteMedia FM801 PCI audio controller
+	  (Abit AU10, Genius Sound Maker, HP Workstation zx2000,
+	  and others), and want to use its gameport.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called fm801-gp.
 
 endif