[U-Boot] UART2 Console in u-boot

[prathika]

hi all,
this might a little silly question. but still wanted to confirm with you 
all.

i  have a board with PPC440 EP where I load u-boot configuring for 
yosemite as my design is similar to that.
I want the console to configured for the UART's second channel.
Is it enough if I change the base address to second channel..Because 
there are UART base address defined only for UART0 and UART1 even if 
CONFIG_SERIAL_MULTI is defined.

Some one please clarify my doubt.

Thanks & Regards,
Prathika R