ARM: dts: Rename logicpd-toredp-37xx-devkit in U-Boot

In U-Boot, this device tree is compatible with both the Torpedo and
SOM-LV kits.  Let's rename it in the device tree since the U-Boot code and
show a more generic OMAP3 name.  The code auto detects between the two and
loads the proper DTB file for Linux.  This would eliminate the SOM-LV showing
the name Torpedo during boot and hopefully eliminate some confusion.

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