ARM: dts: logicpd-torpedo: Disable Bluetooth Serial DMA

The default serial driver for omap2plus is the 8250_omap driver.
Unfortunately, this driver does not yet appear to have fully
functional DMA on OMAP3630/DM3730 which causes some timeouts and
frame errors.

This patch removes the DMA entry from the device tree which allow
the UART to operate without Bluetooth frame errors. If/when DMA
is working on OMAP3630, this should be reverted.

Signed-off-by: Adam Ford <[e-mail]>
Signed-off-by: Tony Lindgren <[e-mail]>

arch/arm/boot/dts/logicpd-torpedo-37xx-devkit.dts

···
 };
 
 &uart2 {
+	/delete-property/dma-names;
 	bluetooth {
 		compatible = "ti,wl1283-st";
 		enable-gpios = <&gpio6 2 GPIO_ACTIVE_HIGH>; /* gpio 162 */