omap3: Allow EHCI to be built on OMAP3

OMAP34XX has EHCI, so select USB_ARCH_HAS_EHCI.
Signed-off-by: Olof Johansson <olof@lixom.net>
Acked-by: Anand Gadiyar <gadiyar@ti.com>
Acked-by: Felipe Balbi <felipe.balbi@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/mach-omap2/Kconfig

@@ -18,6 +18,7 @@ config ARCH_OMAP2430
 config ARCH_OMAP34XX
 	bool "OMAP34xx Based System"
 	depends on ARCH_OMAP3
+	select USB_ARCH_HAS_EHCI
 
 config ARCH_OMAP3430
 	bool "OMAP3430 support"