aco: Use 24-bit multiplication in TCS I/O

aco: Use 24-bit multiplication in TCS I/O

The TCS inputs and outputs must always fit into the LDS,
which implies that their addresses also always fit 24 bits.

On AMD GPUs, 24-bit multiplication is much faster than 32-bit
multiplication, so we can take the opportunity to use that
for TCS I/O instead.

Signed-off-by: Timur Kristóf <timur.kristof@gmail.com>
Reviewed-by: Rhys Perry <pendingchaos02@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4536>