clk: imx: Add API for clk unregister when driver probe fail

For i.MX clock drivers probe fail case, clks should be unregistered
in the return path, this patch adds a common API for i.MX clock
drivers to unregister clocks when fail.
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

drivers/clk/imx/clk.c

@@ -14,6 +14,14 @@
 
 DEFINE_SPINLOCK(imx_ccm_lock);
 
+void imx_unregister_clocks(struct clk *clks[], unsigned int count)
+{
+	unsigned int i;
+
+	for (i = 0; i < count; i++)
+		clk_unregister(clks[i]);
+}
+
 void __init imx_mmdc_mask_handshake(void __iomem *ccm_base,
 				    unsigned int chn)
 {

drivers/clk/imx/clk.h

@@ -12,6 +12,7 @@ void imx_check_clk_hws(struct clk_hw *clks[], unsigned int count);
 void imx_register_uart_clocks(struct clk ** const clks[]);
 void imx_register_uart_clocks_hws(struct clk_hw ** const hws[]);
 void imx_mmdc_mask_handshake(void __iomem *ccm_base, unsigned int chn);
+void imx_unregister_clocks(struct clk *clks[], unsigned int count);
 
 extern void imx_cscmr1_fixup(u32 *val);