arch/riscv: Add generic_ffs() func supported [1/1]

PD#SWPL-93083

Problem:
Add generic_ffs() func supported

Solution:
Add generic_ffs() func supported

Verify:
N/A

Change-Id: I9db78fd3ed521dad5e70286c055c9bd9671988bd
Signed-off-by: xiaohu.huang <xiaohu.huang@amlogic.com>
1 file changed