ide: introduce HAVE_IDE

To allow flexible configuration of IDE introduce HAVE_IDE.
All archs except arm, um and s390 unconditionally select it.
For arm the actual configuration determine if IDE is supported.

This is a step towards introducing drivers/Kconfig for arm.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Acked-by: Russell King - ARM Linux <linux@arm.linux.org.uk>
Acked-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index 6e035d1..d87d4bf 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -8,6 +8,7 @@
 config SUPERH
 	def_bool y
 	select EMBEDDED
+	select HAVE_IDE
 	select HAVE_OPROFILE
 	help
 	  The SuperH is a RISC processor targeted for use in embedded systems