dt-bindings: usb: qcom,snps-dwc3: Add constraints for SM6375

dt-bindings: usb: qcom,snps-dwc3: Add constraints for SM6375

The qcom,sm6375-dwc3 is already documented in top level part, but it
misses specific constraints for clocks and interrupts.

Closes: https://sashiko.dev/#/patchset/20260319092348.35237-2-krzysztof.kozlowski%40oss.qualcomm.com
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Acked-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://patch.msgid.link/20260323-dt-bindings-snps-qcom-dwc3-cleanup-v2-3-3bcd37c0a5b5@oss.qualcomm.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>