ARM: dts: logicpd-torpedo-37xx-devkit-u-boot: Fix MMC Card Detect

When re-syncing the DTS files from the kernel, something caused
the MMC driver to no longer detect the MMC card. Undoing the
CD-invert appears to fix the issue.

Fixes: e6ea2390 ("ARM: DTS: Resync LogicPD-Torpedo-37xx-devkit
with Linux 4.18-RC4")

Signed-off-by: Adam Ford <aford173@gmail.com>