arm64: dts: allwinner: Don't use cd-inverted in sun50i-a64-pinebook

Another user of cd-inverted seems to have crept in. Switch it away from
cd-inverted to be consistent with other sunxi boards.

Signed-off-by: Tuomas Tynkkynen <tuomas@tuxera.com>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>