clk: sifive: append missing \n to messages

If multiple messages are written, line-feeds improve the readability.

Fixes: c40b6df87fc0 ("clk: Add SiFive FU540 PRCI clock driver")
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Sean Anderson <seanga2@gmail.com>
1 file changed