clk: meson: pll: add pcie lock retry workaround

The PCIe PLL locking may be unreliable under some circumstance, such as
high or low temperature. If the PLL fails to lock, reset it a try again.

This helps on the S905X4

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
[commit message amend]
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Link: https://lore.kernel.org/r/cc80cda0-4dda-2e3e-3fc8-afa97717479b@gmail.com