sbi_console: 256th char of OpenSBI banner is skipped

[kadiwa4]

The banner currently looks like this:

OpenSBI v1.3.1
   ____                    _____ ____ _____
  / __ \                  / ____|  _ \_   _|
 | |  | |_ __   ___ _ __ | (___ | |_) || |
 | |  | | '_ \ / _ \ '_ \ \___ \|  _ < | |
 | |__| | |_) |  __/ | | |____) | |_) || |_
  \____/| .__/ \___|_| |_|_____/|___/_____|
        | |
        |_|

Notice how the bottom of the B is missing an underscore. That was probably introduced by 65c2190.

Edit: fixed by cc89fa7, ff43168 or a73982d but there hasn't been another release fixing the regression, so I'm keeping this open.