clk: meson: add minimal driver for g12a-ao clocks

Add minimal driver AO clocks on meson G12A family. Only ADC related clocks
are supported.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
Tested-by: Jaehoon Chung <jh80.chung@samsung.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
diff --git a/drivers/clk/meson/Makefile b/drivers/clk/meson/Makefile
index c873d69..7204383 100644
--- a/drivers/clk/meson/Makefile
+++ b/drivers/clk/meson/Makefile
@@ -6,4 +6,5 @@
 obj-$(CONFIG_CLK_MESON_GX) += gxbb.o
 obj-$(CONFIG_CLK_MESON_AXG) += axg.o
 obj-$(CONFIG_CLK_MESON_G12A) += g12a.o
+obj-$(CONFIG_CLK_MESON_G12A) += g12a-ao.o