clk: meson: g12a: Add missing NNA source clocks for g12b

This adds the Neural Network Accelerator source clocks for g12b.

Initial support for sm1 already exist in
commit 2f1efa53
("clk: meson: g12a: Add support for NNA CLK source clocks")

The sm1 and g12b share the same NNA source clocks.
This patch add missing NNA clocks for A311D (g12b).

Signed-off-by: Nick Xie <nick@khadas.com>
Acked-by: Neil Armstrong <narmstrong@baylibre.com>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Link: https://lore.kernel.org/r/20210604032957.224496-1-xieqinick@gmail.com