crypto: api - Add fips_enable flag

Add the ability to turn FIPS-compliant mode on or off at boot

In order to be FIPS compliant, several check may need to be preformed that may
be construed as unusefull in a non-compliant mode.  This patch allows us to set
a kernel flag incating that we are running in a fips-compliant mode from boot
up.  It also exports that mode information to user space via a sysctl
(/proc/sys/crypto/fips_enabled).

Tested successfully by me.

Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto/Kconfig

@@ -21,6 +21,14 @@ if CRYPTO
 
 comment "Crypto core or helper"
 
+config CRYPTO_FIPS
+	bool "FIPS 200 compliance"
+	help
+	  This options enables the fips boot option which is
+	  required if you want to system to operate in a FIPS 200
+	  certification.  You should say no unless you know what
+	  this is.
+
 config CRYPTO_ALGAPI
 	tristate
 	help