dt-bindings: interrupt-controller: Fix compatible used in ti,pruss-intc

As per soc/ti/ti,pruss.yaml schema, only ti,am4376-pruss0 and
ti,am4376-pruss1 are valid compatibles. Replace ti,am4376-pruss with
ti,am4376-pruss1 based on example in soc/ti/ti,pruss.yaml

This fixes the below warning with 'make DT_CHECKER_FLAGS=-m dt_binding_check':

    interrupt-controller/ti,pruss-intc.example.dt.yaml:0:0: /example-1/pruss@0:
    failed to match any schema with compatible: ['ti,am4376-pruss']

Cc: Rob Herring <robh+dt@kernel.org>
Cc: Suman Anna <s-anna@ti.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Acked-by: Suman Anna <s-anna@ti.com>
Link: https://lore.kernel.org/r/20210607184257.2010276-1-sudeep.holla@arm.com


Signed-off-by: Rob Herring <robh@kernel.org>