bus: ti-sysc: Drop legacy quirk handling for uarts
With the 8250_omap and omap-serial drivers no longer relying on the use
of pm_runtime_irq_safe(), we can finally drop the related legacy quirk
handling for uarts.
Reviewed-by: Dhruva Gole <d-gole@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>