usb: musb: omap2430: Clean up enable and remove devctl tinkering

There should be no need to tinker with devctl in enable in the SoC glue
code. We have musb_start() to take care of handling it already.

Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Bin Liu <b-liu@ti.com>
Link: https://lore.kernel.org/r/20200115132547.364-9-b-liu@ti.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>