Kconfig: eliminate "def_bool n" constructs

Using "def_bool n" is pointless, simply using bool here appears more
appropriate.

Further, retaining such options that don't have a prompt and aren't
selected by anything seems also at least questionable.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/lib/Kconfig b/lib/Kconfig
index c7ad7a5..85cf7ea 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -8,10 +8,10 @@
 	tristate
 
 config GENERIC_FIND_FIRST_BIT
-	def_bool n
+	bool
 
 config GENERIC_FIND_NEXT_BIT
-	def_bool n
+	bool
 
 config CRC_CCITT
 	tristate "CRC-CCITT functions"