update axi full examples with correct rx_buffer size

[nij-intel]

use this document to update the examples with correct buffer size

https://github.com/chipsalliance/aib-protocols/blob/main/axi4-st/doc/axi4_latency_rx_buffer_sizing_guide.pdf

[saravi1x]

Updated RX FIFO size based on axi4_latency_rx_buffer_sizing_guide.