ARM: dts: omap3-pandora-common: remove unneded unit name

This patch fixes the following DTC warnings for omap3-pandora-600mhz.dtb
and omap3-pandora-1ghz.dtb:

"connector@1 has a unit name, but no reg property"

Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>