parisc: led driver requires CONFIG_VM_EVENT_COUNTERS

LED activity is calculated out of the vm event counters wich are delivered
through the all_vm_events() function which requires CONFIG_VM_EVENT_COUNTERS.
Signed-off-by: NHelge Deller <deller@gmx.de>

drivers/parisc/Kconfig

@@ -128,6 +128,7 @@ config SUPERIO
 config CHASSIS_LCD_LED
 	bool "Chassis LCD and LED support"
 	default y
+	select VM_EVENT_COUNTERS
 	help
 	  Say Y here if you want to enable support for the Heartbeat,
 	  Disk/Network activities LEDs on some PA-RISC machines,