riscv: sbi: Fix comment of __sbi_set_timer_v01

Fix the comment of __sbi_set_timer_v01, the function name in comment
is missing '__'

Signed-off-by: Nanyong Sun <sunnanyong@huawei.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
1 file changed