arm64: dts: qcom: msm8994: fix duplicated @6c00000 reserved memory

arm64: dts: qcom: msm8994: fix duplicated @6c00000 reserved memory

Reserved memory @6c00000 is defined in MSM8994 DTSI and few boards:

  Warning (unique_unit_address_if_enabled): /reserved-memory/reserved@6c00000: duplicate unit-address (also used in node /reserved-memory/hole2@6c00000)
  Warning (unique_unit_address_if_enabled): /reserved-memory/reserved@6c00000: duplicate unit-address (also used in node /reserved-memory/memory@6c00000)

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230720072048.10093-1-krzysztof.kozlowski@linaro.org
Signed-off-by: Bjorn Andersson <andersson@kernel.org>