OMAP3 clock: put DPLL into bypass if bypass rate = clk->rate, not hardware rate

When a non-CORE DPLL is enabled via omap3_noncore_dpll_enable(), use
the user's desired rate in clk->rate to determine whether to put the
DPLL into bypass or lock mode, rather than reading the DPLL's current
idle state from its hardware registers.

This fixes a bug observed when leaving retention. Non-CORE DPLLs were
not being relocked when downstream clocks re-enabled; rather, the DPLL
entered bypass mode.

Problem reported by Tero Kristo <tero.kristo@nokia.com>.

Signed-off-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>