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The USB2 PHY driver expects named clocks for wakeup clock
and reference clock. Provide this information for USB2 PHY
nodes in OMAP4 and OMAP5 SoC DTS.

CC: Benoît Cousson <bcousson@baylibre.com>
Reviewed-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>