can: mcp251xfd: mcp251xfd_dump(): fix comment

The driver uses only 1 TEF and 1 TX ring, but a variable number of RX
rings. Fix comment accordingly.

Fixes: e0ab3dd5 ("can: mcp251xfd: add dev coredump support")
Link: https://lore.kernel.org/all/20220726084328.4042678-1-mkl@pengutronix.deSigned-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

drivers/net/can/spi/mcp251xfd/mcp251xfd-dump.c

@@ -253,7 +253,7 @@ void mcp251xfd_dump(const struct mcp251xfd_priv *priv)
 		file_size += mcp251xfd_dump_reg_space[i].size / sizeof(u32) *
 			sizeof(struct mcp251xfd_dump_object_reg);
 
-	/* TEF ring, RX ring, TX rings */
+	/* TEF ring, RX rings, TX ring */
 	rings_num = 1 + priv->rx_ring_num + 1;
 	obj_num += rings_num;
 	file_size += rings_num * __MCP251XFD_DUMP_OBJECT_RING_KEY_MAX  *