Define RNDGETENTCNT properly

That is, using _IOR() macro instead of a numeric constant.

Author: resilar

crypto.c

@@ -469,7 +469,7 @@ void pbkdf2_hmac_sha256(const void *pass, size_t m, const void *salt, size_t n,
 #include <sys/ioctl.h>
 /* musl does not have <linux/random.h> so let's define RNDGETENTCNT here */
 #ifndef RNDGETENTCNT
-#define RNDGETENTCNT 0x80045200
+#define RNDGETENTCNT _IOR('R', 0x00, int)
 #endif
 #endif