Increase delay after PLL IDDQ release to 5us per PLL specifications.

based on work by Alex Frid <afrid@nvidia.com>
Signed-off-by: NPeter De Schrijver <pdeschrijver@nvidia.com>
Tested-by: NThierry Reding <treding@nvidia.com>
Acked-by: NThierry Reding <treding@nvidia.com>
Signed-off-by: NStephen Boyd <sboyd@codeaurora.org>