Fix miscellaneous clang-tidy warnings.

There are still a ton of them, almost exclusively complaints that
function declaration and definitions have different parameter names. I
just fixed a few randomly.

Change-Id: I1072f3dba8f63372cda92425aa94f4aa9e3911fa
Reviewed-on: https://boringssl-review.googlesource.com/18706
Reviewed-by: Steven Valdez <svaldez@google.com>
diff --git a/include/openssl/rsa.h b/include/openssl/rsa.h
index a580f97..ed2c0be 100644
--- a/include/openssl/rsa.h
+++ b/include/openssl/rsa.h
@@ -456,8 +456,8 @@
                                         CRYPTO_EX_unused *unused,
                                         CRYPTO_EX_dup *dup_unused,
                                         CRYPTO_EX_free *free_func);
-OPENSSL_EXPORT int RSA_set_ex_data(RSA *r, int idx, void *arg);
-OPENSSL_EXPORT void *RSA_get_ex_data(const RSA *r, int idx);
+OPENSSL_EXPORT int RSA_set_ex_data(RSA *rsa, int idx, void *arg);
+OPENSSL_EXPORT void *RSA_get_ex_data(const RSA *rsa, int idx);
 
 
 /* Flags. */