digsig: build dependency fix

Fix build errors by adding Kconfig dependency on KEYS.
CRYPTO dependency removed.

  CC      security/integrity/digsig.o
security/integrity/digsig.c: In function ?integrity_digsig_verify?:
security/integrity/digsig.c:38:4: error: implicit declaration of function ?request_key?
security/integrity/digsig.c:38:17: error: ?key_type_keyring? undeclared (first use in this function)
security/integrity/digsig.c:38:17: note: each undeclared identifier is reported only once for each function it appears in
make[2]: *** [security/integrity/digsig.o] Error 1

Reported-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Dmitry Kasatkin <dmitry.kasatkin@intel.com>
Signed-off-by: James Morris <jmorris@namei.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/Kconfig b/lib/Kconfig
index c1a89185fe6..5634e473ff6 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -295,7 +295,7 @@ config MPILIB_EXTRA
 
 config DIGSIG
         tristate "In-kernel signature checker"
-        depends on CRYPTO
+        depends on KEYS
         select MPILIB
         help
           Digital signature verification. Currently only RSA is supported.