[PATCH] USB: remove include of asm/usb.h in ohci-ppc-soc.c

ohci-ppc-soc.c provides for a platform-specific callback mechanism for
when the HC is successfully probed or removed.  It turned out that none
of the 3 platforms using it need this facility. Also the required
include/asm-ppc/usb.h has never been accepted.  This patch removes the
callback feature and the include of <asm/usb.h>.

Signed-off-by: Dale Farnsworth <dale@farnsworth.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>