drivers: clk: adi: Add in SC5XX-family clock driver

This adds support for the SC5XX clock trees which are required for reading
clock speeds on the SoCs. This is largely a port of the same support for
Linux, which has not yet been submitted upstream.

Co-developed-by: Greg Malysa <greg.malysa@timesys.com>
Signed-off-by: Greg Malysa <greg.malysa@timesys.com>
Co-developed-by: Ian Roberts <ian.roberts@timesys.com>
Signed-off-by: Ian Roberts <ian.roberts@timesys.com>
Signed-off-by: Vasileios Bimpikas <vasileios.bimpikas@analog.com>
Signed-off-by: Utsav Agarwal <utsav.agarwal@analog.com>
Signed-off-by: Arturs Artamonovs <arturs.artamonovs@analog.com>
Signed-off-by: Nathan Barrett-Morrison <nathan.morrison@timesys.com>
diff --git a/MAINTAINERS b/MAINTAINERS
index d184296..831f6da 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -610,6 +610,7 @@
 T:	git https://github.com/analogdevicesinc/lnxdsp-u-boot
 F:	arch/arm/include/asm/arch-adi/
 F:	arch/arm/mach-sc5xx/
+F:	drivers/clk/adi/
 F:	include/env/adi/
 
 ARM SNAPDRAGON