arm: socfpga: board: Align checkboard() output

arm: socfpga: board: Align checkboard() output

Cosmetic change to the checkboard() function output. Align the
output with the rest of initial output produced by U-Boot.

Signed-off-by: Marek Vasut <[email protected]>
Cc: Chin Liang See <[email protected]>
Cc: Dinh Nguyen <[email protected]>
Cc: Albert Aribaud <[email protected]>
Cc: Tom Rini <[email protected]>
Cc: Wolfgang Denk <[email protected]>
Cc: Pavel Machek <[email protected]>
Acked-by: Pavel Machek <[email protected]>