Current git head oops'es at boot on Overo

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Build is stock 62c36fdd962de2db5d62a326490913f41c442a5c, no additional patches.

Without DEBUG_LL, boot silently fails. With DEBUG_LL, one can see that
the failure is due to a NULL pointer dereference in musb.

I suspect that the root cause is related to:

<3>i2c_omap i2c_omap.1: controller timed out
<4>twl4030_usb: probe of twl4030_usb failed with error -22

Adding David Brownell's i2c-omap timeout workaround patch eliminates
this error and the boot then fails on EHCI.

I disabled EHCI in defconfig and was able to get the boot to complete.
 However unlike others, I find that musb is not functional -- and the
trick of disconnecting the USB cable and then reconnecting it does not
work.

Steve
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