clk: k210: Move k210 clock out of its own subdirectory

Now that we have only one clock driver, we don't need to have our own
subdirectory. Move the driver back with the rest of the clock drivers.

The MAINTAINERS for kendryte pinctrl is also fixed since it has always been
wrong.

Signed-off-by: Sean Anderson <seanga2@gmail.com>
Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>
diff --git a/drivers/clk/Kconfig b/drivers/clk/Kconfig
index 40a5a5d..4bc6680 100644
--- a/drivers/clk/Kconfig
+++ b/drivers/clk/Kconfig
@@ -159,11 +159,23 @@
 	  by a SCMI agent based on SCMI clock protocol communication
 	  with a SCMI server.
 
+config CLK_K210
+	bool "Clock support for Kendryte K210"
+	depends on CLK
+	help
+	  This enables support clock driver for Kendryte K210 platforms.
+
+config CLK_K210_SET_RATE
+	bool "Enable setting the Kendryte K210 PLL rate"
+	depends on CLK_K210
+	help
+	  Add functionality to calculate new rates for K210 PLLs. Enabling this
+	  feature adds around 1K to U-Boot's final size.
+
 source "drivers/clk/analogbits/Kconfig"
 source "drivers/clk/at91/Kconfig"
 source "drivers/clk/exynos/Kconfig"
 source "drivers/clk/imx/Kconfig"
-source "drivers/clk/kendryte/Kconfig"
 source "drivers/clk/meson/Kconfig"
 source "drivers/clk/microchip/Kconfig"
 source "drivers/clk/mvebu/Kconfig"