ARM: dts: AM35xx: use DT clock data

AM35xx now uses the clock data from device tree. Most of the data is
shared with OMAP3xxx, but as there is some delta, a new base .dtsi
file is also created for the SoC.
Signed-off-by: Tero Kristo <t-kristo@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>

arch/arm/boot/dts/am3517.dtsi

@@ -61,3 +61,6 @@ uart4: serial@4809e000 {
 		};
 	};
 };
+
+/include/ "am35xx-clocks.dtsi"
+/include/ "omap36xx-am35xx-omap3430es2plus-clocks.dtsi"