clk: Introduce clk-provider.h to store Common Clock Framework's internals

This file now stores the dev_get_clk_ptr() wrapper on the dev_get_uclass_priv()
function.

Signed-off-by: Lukasz Majewski <lukma@denx.de>
diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h
new file mode 100644
index 0000000..6adf0a5
--- /dev/null
+++ b/include/linux/clk-provider.h
@@ -0,0 +1,16 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2019 DENX Software Engineering
+ * Lukasz Majewski, DENX Software Engineering, lukma@denx.de
+ *
+ * Copyright (c) 2010-2011 Jeremy Kerr <jeremy.kerr@canonical.com>
+ * Copyright (C) 2011-2012 Linaro Ltd <mturquette@linaro.org>
+ */
+#ifndef __LINUX_CLK_PROVIDER_H
+#define __LINUX_CLK_PROVIDER_H
+
+static inline struct clk *dev_get_clk_ptr(struct udevice *dev)
+{
+	return (struct clk *)dev_get_uclass_priv(dev);
+}
+#endif /* __LINUX_CLK_PROVIDER_H */