[RESEND PATCH v4] clk: stm32f4: fix post divisor setup for I2S/SAI PLLs

[Stephen Boyd]

Quoting Dario Binacchi (2021-08-01 12:37:10)
> 
> As said in a previous email to Stephen, the patch I submitted fixes commit 517633ef630e
> ("clk: stm32f4: Add post divisor for I2S & SAI PLLs"), so IMHO it should not be dropped from the tree.
> What Dillon suggested should instead be fixed by another patch.

Ok. I'll send off the fix to Linus today.