Cortex-R5 PMU counter example

Implements example that demonstrates usage of R5 PMU counters and the available APIs provided through xpm_counter.c. This example is applicable only on Cortex-R5 based platforms.

Expected output

Start of R5 PMU Example
Instruction Executed Event Cntr = 100
Data Read Event Cntr = 10
R5 PMU example has PASSED