[BUG] mt7986 doesn't allow to re-enable ethsys clock gates after they have been disabled

[Matthias Brugger]

+CC relevant people.

Hi Eugene,

On 12/03/2023 02:25, Eugene Konev wrote:
> When ethsys clocks (eth_fe_en, eth_gp1_en, eth_gp2_en, eth_wocpu1_en and
> eth_wocpu0_en) are disabled calling clk_enable on them doesn't enable them
> again (appropriate bits in the register stay 0).
> This prevents using mtk_eth as module, because kernel disables all unclaimed
> clocks with clk_disable_unused.
> 

Is this a regression? Were you able to bisect the issue to see which commit 
introduced this behavior?

Regards,
Matthias