Enable UART2 for AM62 based SOM's Verdin carrier boards Dahlia,
Development and Yavia.

Earlier Verdin UART2 was reserved by R5 DM firmware which can be now
configured using boardcfg during U-boot compilation. In a default
config, no one writes to this UART.
Signed-off-by: Parth Pancholi <parth.pancholi@toradex.com>
Reviewed-by: Francesco Dolcini <francesco.dolcini@toradex.com>
Link: https://lore.kernel.org/r/20231121160436.1032364-1-parth105105@gmail.comSigned-off-by: Nishanth Menon <nm@ti.com>