arm64: dts: qcom: sda660-inforce-ifc6560: fix no-mmc property for SDHCI

There is no "no-emmc" property, so intention for SD/SDIO only nodes was
to use "no-mmc":

  qcom/sda660-inforce-ifc6560.dtb: mmc@c084000: Unevaluated properties are not allowed ('no-emmc' was unexpected)

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20221204094438.73288-4-krzysztof.kozlowski@linaro.org