imx: thermal: Kconfig: add MX7

The thermal drivers support i.MX6 and i.MX7, add MX7 in Kconfig file.
Signed-off-by: NPeng Fan <peng.fan@nxp.com>
Cc: Stefano Babic <sbabic@denx.de>

drivers/thermal/Kconfig

@@ -10,7 +10,7 @@ if DM_THERMAL
 
 config IMX_THERMAL
 	bool "Temperature sensor driver for Freescale i.MX SoCs"
-	depends on MX6
+	depends on MX6 || MX7
 	help
 	  Support for Temperature Monitor (TEMPMON) found on Freescale i.MX SoCs.
           It supports one critical trip point and one passive trip point.  The