ARM: dts: qcom: Drop MMCI interrupt-names

The pl18x MMCI driver does not use the interrupt-names property,
the binding document has been updated to recommend this property
be unused, remove it.

Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Marek Vasut <marex@denx.de>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20221013221242.218808-2-marex@denx.de