thermal: imx_thermal: rework driver to be reused

Rework imx_thermal driver to be used across i.MX
processor that support thermal sensor

Signed-off-by: Adrian Alonso <aalonso@freescale.com>
Signed-off-by: Peng Fan <Peng.Fan@freescale.com>
diff --git a/include/configs/mx6ul_14x14_evk.h b/include/configs/mx6ul_14x14_evk.h
index 4a2280b..d8a4f16 100644
--- a/include/configs/mx6ul_14x14_evk.h
+++ b/include/configs/mx6ul_14x14_evk.h
@@ -241,6 +241,6 @@
 #define CONFIG_FEC_DMA_MINALIGN		64
 #endif
 
-#define CONFIG_IMX6_THERMAL
+#define CONFIG_IMX_THERMAL
 
 #endif