ENGR00221450 imx6 thermal: add sys_close() in cooling device

add sys_close() to close opened file in cooling device
Signed-off-by: Rong Dian <b38775@freescale.com>

drivers/mxc/thermal/cooling.c

@@ -178,6 +178,7 @@ int anatop_thermal_cpu_hotplug(bool cpu_on)
 					sys_write(fd, (char *)"1", MAX_CPU_ONLINE_LEN);
 					cpu_mask &= ~(0x1 << cpu);
 					ret = 0;
+					sys_close(fd);
 					break;
 				}
 				sys_close(fd);
@@ -199,6 +200,7 @@ int anatop_thermal_cpu_hotplug(bool cpu_on)
 					sys_write(fd, (char *)"0", MAX_CPU_ONLINE_LEN);
 					cpu_mask |= 0x1 << cpu;
 					ret = 0;
+					sys_close(fd);
 					break;
 				}
 				sys_close(fd);