dt-bindings: interconnect: Add EPSS L3 compatible for QCS8300 SoC

dt-bindings: interconnect: Add EPSS L3 compatible for QCS8300 SoC

Add Epoch Subsystem (EPSS) L3 interconnect provider binding for
QCS8300 SoC. As the EPSS hardware in QCS8300 and SA8775P are same,
added a family-level compatible for SA877P SoC. This shared fallback
compatible allows grouping of SoCs with similar hardware, reducing
the need to explicitly list each variant in the driver match table.

Signed-off-by: Raviteja Laggyshetty <raviteja.laggyshetty@oss.qualcomm.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20250711102540.143-2-raviteja.laggyshetty@oss.qualcomm.com
Signed-off-by: Georgi Djakov <djakov@kernel.org>