clk: sunxi: Add Allwinner R40 CLK driver

Add initial clock driver for Allwinner R40.

- Implement USB bus and USB clocks via ccu_clk_gate
  for R40, so it can accessed in common clk enable
  and disable functions from clk_sunxi.c
- Implement USB bus and USB resets via ccu_reset table
  for R40, 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/Makefile b/drivers/clk/sunxi/Makefile
index 4a254c8..61f8b87 100644
--- a/drivers/clk/sunxi/Makefile
+++ b/drivers/clk/sunxi/Makefile
@@ -11,5 +11,6 @@
 obj-$(CONFIG_CLK_SUN6I_A31) += clk_a31.o
 obj-$(CONFIG_CLK_SUN8I_A23) += clk_a23.o
 obj-$(CONFIG_CLK_SUN8I_A83T) += clk_a83t.o
+obj-$(CONFIG_CLK_SUN8I_R40) += clk_r40.o
 obj-$(CONFIG_CLK_SUN8I_H3) += clk_h3.o
 obj-$(CONFIG_CLK_SUN50I_A64) += clk_a64.o