crypto: drbg - fix sparse warning for cpu_to_be[32|64]

The sparse tool complained that the cpu_to_be[32|64] functions return
__be[32|64] instead of __u32 or __u64. The patch replaces the __u32 and
__u64 with __be32 and __be64.
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto/drbg.c

@@ -277,7 +277,7 @@ static bool drbg_fips_continuous_test(struct drbg_state *drbg,
 static inline void drbg_cpu_to_be32(__u32 val, unsigned char *buf)
 {
 	struct s {
-		__u32 conv;
+		__be32 conv;
 	};
 	struct s *conversion = (struct s *) buf;
 
@@ -989,7 +989,7 @@ static int drbg_hash_generate(struct drbg_state *drbg,
 	int ret = 0;
 	union {
 		unsigned char req[8];
-		__u64 req_int;
+		__be64 req_int;
 	} u;
 	unsigned char prefix = DRBG_PREFIX3;
 	struct drbg_string data1, data2;