leds: ip30: compile if COMPILE_TEST=y

This driver can be compiled on other platforms with small change if
COMPILE_TEST=y.

Signed-off-by: Marek Behún <[e-mail]>
Cc: Pavel Machek <[e-mail]>
Cc: Dan Murphy <[e-mail]>
Cc: Thomas Bogendoerfer <[e-mail]>
Signed-off-by: Pavel Machek <[e-mail]>

drivers/leds/Kconfig

···
 config LEDS_IP30
 	tristate "LED support for SGI Octane machines"
 	depends on LEDS_CLASS
-	depends on SGI_MFD_IOC3
+	depends on SGI_MFD_IOC3 || COMPILE_TEST
 	help
 	  This option enables support for the Red and White LEDs of
 	  SGI Octane machines.

drivers/leds/leds-ip30.c

···
  * LED Driver for SGI Octane machines
  */
 
+#include <asm/io.h>
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/platform_device.h>