OMAP: hwmod: Set autoidle after smartidle during _sysc_enable

OMAP USBOTG module has a requirement to set the autoidle bit only after
setting smartidle bit. Modified the _sys_enable api to set the smartidle
first and then the autoidle bit. Setting this will not have any impact on the
other modules.

Signed-off-by: Hema HK <hemahk@ti.com>
Signed-off-by: Partha Basak <p-basak2@ti.com>
Cc: Felipe Balbi <balbi@ti.com>
Cc: Tony Lindgren <tony@atomide.com>
Cc: Kevin Hilman <khilman@deeprootsystems.com>
Acked-by: Benoit Cousson <b-cousson@ti.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>