Should MMC TRSTn be connected to other TRSTn?
Based on AFCZ review by P. Kulik
Currently MMC TRSTn is connected directly to AMC_TRSTn and through diode to FMC1,2 and RTM. IMO MMC TRSTn shouldn't be connected to FMC and RTM JTAG and should be connected to AMC JTAG only when P3V3 is low (the same condition as in IC12).