arch/riscv: remove -fno-builtin gcc option for AOCPU [1/1]

PD#SWPL-97697

Problem:
The gcc option -fno-builtin degrade performance of AOCPU,
because it disables the gcc optimization for some built-in
functions like memcpy, etc.

Solution:
Remove the gcc option -fno-builtin for AOCPU compilation.

Verify:
A5-AV409, S5-AX201

Change-Id: Ieceb4f1efff4c869e8b8cedd80e2c0121bec3337
Signed-off-by: Yao Jie <jie.yao@amlogic.com>
1 file changed