[BlueZ] avctp: Fix typo in comment which contradicts the conditional below

The comment says "If the request set a callback send it directly" but
checks for whether "the request did not set a callback" using
if (!func)
---
 profiles/audio/avctp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/profiles/audio/avctp.c b/profiles/audio/avctp.c
index f20e08c00ac8..336511bf9612 100644
--- a/profiles/audio/avctp.c
+++ b/profiles/audio/avctp.c
@@ -1632,7 +1632,7 @@ static int avctp_send_req(struct avctp *session, uint8_t code,
 	if (control == NULL)
 		return -ENOTCONN;
 
-	/* If the request set a callback send it directly */
+	/* If the request did not set a callback send it directly */
 	if (!func)
 		return avctp_send(session->control, -1, AVCTP_COMMAND,
 				code, subunit, opcode, operands, operand_count);
-- 
2.55.0