gcc-plugins: latent_entropy: remove unneeded semicolon

Fix the following coccicheck warning:

scripts/gcc-plugins/latent_entropy_plugin.c:539:2-3: Unneeded semicolon
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Jason Yan <yanaijie@huawei.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20200418070521.10931-1-yanaijie@huawei.com

scripts/gcc-plugins/latent_entropy_plugin.c

@@ -524,7 +524,7 @@ static unsigned int latent_entropy_execute(void)
 	while (bb != EXIT_BLOCK_PTR_FOR_FN(cfun)) {
 		perturb_local_entropy(bb, local_entropy);
 		bb = bb->next_bb;
-	};
+	}
 
 	/* 4. mix local entropy into the global entropy variable */
 	perturb_latent_entropy(local_entropy);