phy: sun4i-usb: remove enable_pmu_unk1 from sun50i_h6_cfg

For the current code, enable_pmu_unk1 only works in non-a83t and non-h6
types. So let's delete it from the sun50i_h6_cfg.

Signed-off-by: Yangtao Li <frank@allwinnertech.com>
Link: https://lore.kernel.org/r/dc8cbb7b3cd59902a6719f207d18a232903fac8a.1604988979.git.frank@allwinnertech.com


Signed-off-by: Vinod Koul <vkoul@kernel.org>