[PATCH 0/28] usb: musb: musb cleanup

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This patches remove dependency on the following option in
musb driver:

	CONFIG_USB_MUSB_OMAP2PLUS
	CONFIG_USB_MUSB_TUSB6010
	CONFIG_USB_MUSB_AM35X
	USB_MUSB_DAVINCI
	USB_MUSB_DA8XX	

also remove the dma controller related options below from
musb source code, and only keep very few of them in header file:
	CONFIG_USB_INVENTRA_DMA
	CONFIG_USB_TUSB_OMAP_DMA
	CONFIG_USB_TI_CPPI_DMA

so musb driver source code is more clean than before, :-).

The patch set makes full use of the hw glue layer implemented
by Felipe.

Since all the specific hardwares related option are removed now,
we can build one single musb driver(binary) to make it working
on multiple machines of same ARCH.

Also the patches support the features below:
	- each glue driver can be compiled as one standalone module
	- each dma controler driver can be compiler as one standalone module

The patch set has been tested on beagle xM, g_ether/g_zero are OK
even both OMAP2PLUS, TUSB6010 and AM35X are enabled and the three
modules are built in one image at the same time.


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