clk: sunxi: Add Allwinner A10/A20 CLK driver

Add initial clock driver for Allwinner A10/A20.

- Implement USB ahb and USB clocks via ccu_clk_gate table
  for A10/A20, so it can accessed in common clk enable and
  disable functions from clk_sunxi.c
- Implement USB resets via ccu_reset table for A10/A20,
  so it can accessed in common reset deassert and assert
  functions from reset-sunxi.c

Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Acked-by: Maxime Ripard <maxime.ripard@bootlin.com>
diff --git a/drivers/clk/sunxi/Kconfig b/drivers/clk/sunxi/Kconfig
index c3713bb..fbbf94e 100644
--- a/drivers/clk/sunxi/Kconfig
+++ b/drivers/clk/sunxi/Kconfig
@@ -9,6 +9,13 @@
 
 if CLK_SUNXI
 
+config CLK_SUN4I_A10
+	bool "Clock driver for Allwinner A10/A20"
+	default MACH_SUN4I || MACH_SUN7I
+	help
+	  This enables common clock driver support for platforms based
+	  on Allwinner A10/A20 SoC.
+
 config CLK_SUN8I_H3
 	bool "Clock driver for Allwinner H3/H5"
 	default MACH_SUNXI_H3_H5