arm: k3: Add regex/gsub command handling

The 'gsub' setexpr sub command is using when creating the FIT image
configuration string on K3 devices. Enable this for K3.

Signed-off-by: Andrew Davis <afd@ti.com>
Signed-off-by: Manorit Chawdhry <m-chawdhry@ti.com>
1 file changed