ARM: OMAP4: Clock: Correct OTG clock to use otg_60m_gfclk

OTG clock usb_otg_hs_ick used a incorrect parent l3_div_ck.
Correct it to use the right colck otg_60m_gfclk as its parent.

Change-Id: Ifbbd2ac297786c7e453c8f6a3efa54413a287e64
Signed-off-by: Wenbiao Wang <wwang@ti.com>
[grygorii.strashko@ti.com - forward port from kernel 3.0]
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Next step in audio driver