feat(linux): AM64X: update 12.01 performace number for IPC

update RPMessage/IPC latency performance number for 12.01 release.

Signed-off-by: Hari Nagalla <hnagalla@ti.com>

Author: h-nagalla

source/devices/AM64X/linux/RT_Linux_Performance_Guide.rst

@@ -736,10 +736,10 @@ Latencies reported:
 .. csv-table::
    :header: "Remote Processor","Message Size (in bytes)","Average round trip (usecs)","Max round trip (usecs)"
 
-   "R5F0_0","1","35","194"
-   "R5F0_0","490","154","255"
-   "M4F","1","43","162"
-   "M4F","490","282","439"
+   "R5F0_0","1","26","149"
+   "R5F0_0","490","153","284"
+   "M4F","1","37","152"
+   "M4F","490","281","444"
 
 .. image:: img/R5_0_0_m1_ipc_latency.png