arm64: dts: allwinner: pinebook: Document MMC0 CD pin name

Normally GPIO pin references are followed by a comment giving the pin
name for searchability. Add the comment here where it was missing.

Signed-off-by: Samuel Holland <samuel@sholland.org>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
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Samuel Holland 2020-01-19 10:31:01 -06:00 • committed by Maxime Ripard
commit 412e19c34f
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