quoted

+	setbits8(&bcsr[7], BCSR_USB_EN);
+	udelay(100000);
+
+	clrbits8(&bcsr[7], BCSR_USB_EN);
+	udelay(100000);

Thats a total bootup delay of 200ms. Is this really needed?

In addition, so large delays should use msleep() if possible (depends
how early we are here).

Cheers,
Ben,

And I suggest to add a few comments to the code explaining why exactly you are 
setting/clearing the bits in the BCSR and the GPIO registers.

Seconded,

Cheers,
Ben.