SoC common : script: Fix prepare_toolchain.sh

PD#SWPL-67525

Problem:
Fix prepare_toolchain.sh.

Solution:
Fix prepare_toolchain.sh.

Verify:
ad401_a113l

Change-Id: Ie0f3062558a177d5c0e6322c389c1daac87a46cc
Signed-off-by: Kelvin Zhang <kelvin.zhang@amlogic.com>
1 file changed