ARM: dts: Update omap3 musb to probe with ti-sysc

We can drop the legacy booting for the related musb driver if we update
the omap3 SoCs variants to boot using ti-sysc interconnect target module.

devicetree@vger.kernel.org
Cc: H. Nikolaus Schaller <hns@goldelico.com>
Tested-by: Sicelo A. Mhlongo <absicsz@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>