clk: Add Microchip PolarFire SoC clock driver

Add clock driver code for the Microchip PolarFire SoC. This driver
handles reset and clock control of the Microchip PolarFire SoC device.

Signed-off-by: Padmarao Begari <padmarao.begari@microchip.com>
Reviewed-by: Anup Patel <anup.patel@wdc.com>
Tested-by: Bin Meng <bin.meng@windriver.com>
diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile
index f8383e5..645709b 100644
--- a/drivers/clk/Makefile
+++ b/drivers/clk/Makefile
@@ -30,6 +30,7 @@
 obj-$(CONFIG_CLK_HSDK) += clk-hsdk-cgu.o
 obj-$(CONFIG_CLK_K210) += kendryte/
 obj-$(CONFIG_CLK_MPC83XX) += mpc83xx_clk.o
+obj-$(CONFIG_CLK_MPFS) += microchip/
 obj-$(CONFIG_CLK_OCTEON) += clk_octeon.o
 obj-$(CONFIG_CLK_OWL) += owl/
 obj-$(CONFIG_CLK_RENESAS) += renesas/