PDA_POWER depends on having request_irq()

... so all proud owners of s390-based PDAs will have to live without that one

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig
index ab9c3e5..3f6e176 100644
--- a/drivers/power/Kconfig
+++ b/drivers/power/Kconfig
@@ -16,6 +16,7 @@
 
 config PDA_POWER
 	tristate "Generic PDA/phone power driver"
+	depends on !S390
 	help
 	  Say Y here to enable generic power driver for PDAs and phones with
 	  one or two external power supplies (AC/USB) connected to main and