ARM: imx3: Fix CCM node reference leak

of_find_compatible_node() returns a referenced device node. The i.MX31
and i.MX35 early init paths use the node to map the CCM registers with
of_iomap(), but never drop the node reference.

Release the node after the mapping is created.

Fixes: 2cf98d1 ("ARM: imx3: Retrieve the CCM base address from devicetree")
Signed-off-by: Yuho Choi <dbgh9129@gmail.com>
Signed-off-by: Frank Li <Frank.Li@nxp.com>

Author: Uuuuuuho

arch/arm/mach-imx/mm-imx3.c

@@ -106,6 +106,7 @@ void __init imx31_init_early(void)
 	arm_pm_idle = imx31_idle;
 	np = of_find_compatible_node(NULL, NULL, "fsl,imx31-ccm");
 	mx3_ccm_base = of_iomap(np, 0);
+	of_node_put(np);
 	BUG_ON(!mx3_ccm_base);
 }
 #endif /* ifdef CONFIG_SOC_IMX31 */
@@ -143,6 +144,7 @@ void __init imx35_init_early(void)
 	arch_ioremap_caller = imx3_ioremap_caller;
 	np = of_find_compatible_node(NULL, NULL, "fsl,imx35-ccm");
 	mx3_ccm_base = of_iomap(np, 0);
+	of_node_put(np);
 	BUG_ON(!mx3_ccm_base);
 }
 #endif /* ifdef CONFIG_SOC_IMX35 */