clk: MediaTek: add clock driver for MT7623 SoC.

This patch adds a driver for MT7623 clock blocks.

Tested-by: Matthias Brugger <matthias.bgg@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/clk/mediatek/Makefile b/drivers/clk/mediatek/Makefile
index 297f99d..0632dc8 100644
--- a/drivers/clk/mediatek/Makefile
+++ b/drivers/clk/mediatek/Makefile
@@ -3,4 +3,5 @@
 obj-$(CONFIG_ARCH_MEDIATEK) += clk-mtk.o
 
 # SoC Drivers
+obj-$(CONFIG_TARGET_MT7623) += clk-mt7623.o
 obj-$(CONFIG_TARGET_MT7629) += clk-mt7629.o