USB: remove USB_EHCI_BIG_ENDIAN_{DESC,MMIO} depends on architecture symbol

Just like the OHCI counter part we just can remove the architecture
specific symbols which prevent these configuration symbols from being
selected by platforms/architectures requiring it. The original
implementation did not scale at all since it required each and every
single architecture to be added for these configuration symbols to be
selected. Now it is up to the EHCI driver and/or platform to select
these configuration symbols accordingly.

Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Florian Fainelli <florian@openwrt.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

arch/sparc/Kconfig

@@ -407,6 +407,8 @@ config SERIAL_CONSOLE
 config SPARC_LEON
 	bool "Sparc Leon processor family"
 	depends on SPARC32
+	select USB_EHCI_BIG_ENDIAN_MMIO
+	select USB_EHCI_BIG_ENDIAN_DESC
 	---help---
 	  If you say Y here if you are running on a SPARC-LEON processor.
 	  The LEON processor is a synthesizable VHDL model of the