clk: Include missing headers for linux/clk-provider.h

This header was missing a couple of include dependencies when included on its
own.

Signed-off-by: Sean Anderson <seanga2@gmail.com>
diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h
index 02ff1a3..0ef6e68 100644
--- a/include/linux/clk-provider.h
+++ b/include/linux/clk-provider.h
@@ -8,6 +8,10 @@
  */
 #ifndef __LINUX_CLK_PROVIDER_H
 #define __LINUX_CLK_PROVIDER_H
+
+#include <dm.h>
+#include <linux/bitops.h>
+#include <linux/err.h>
 #include <clk-uclass.h>
 
 static inline void clk_dm(ulong id, struct clk *clk)