mptcp: fix typos in comments

This patch fixes the spelling mistakes in comments.
The changes were generated using codespell and reviewed manually.

eariler -> earlier
greceful -> graceful

Signed-off-by: Shi-Sheng Yang <[e-mail]>
Reviewed-by: Simon Horman <[e-mail]>
Reviewed-by: Matthieu Baerts (NGI0) <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Jakub Kicinski <[e-mail]>

net/mptcp/subflow.c

···
 	}
 
 	/* check for expected invariant - should never trigger, just help
-	 * catching eariler subtle bugs
+	 * catching earlier subtle bugs
 	 */
 	WARN_ON_ONCE(child && *own_req && tcp_sk(child)->is_mptcp &&
 		     (!mptcp_subflow_ctx(child) ||
···
 	struct mptcp_subflow_context *subflow = mptcp_subflow_ctx(ssk);
 	unsigned long fail_tout;
 
-	/* greceful failure can happen only on the MPC subflow */
+	/* graceful failure can happen only on the MPC subflow */
 	if (WARN_ON_ONCE(ssk != READ_ONCE(msk->first)))
 		return;