thermal: Fix build error of missing devm_ioremap_resource on UM

The devres.o gets linked if HAS_IOMEM is present so on ARCH=um
allyesconfig (COMPILE_TEST) failed on many files with:

drivers/thermal/thermal_mmio.o:
In function 'thermal_mmio_probe':thermal_mmio.c:(.text+0xe1):
undefined reference to `devm_ioremap_resource'

The users of devm_ioremap_resource() which are compile-testable
should depend on HAS_IOMEM.
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Talel Shenhar <talel@amazon.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>

drivers/thermal/Kconfig

@@ -203,6 +203,7 @@ config THERMAL_EMULATION
 config THERMAL_MMIO
 	tristate "Generic Thermal MMIO driver"
 	depends on OF || COMPILE_TEST
+	depends on HAS_IOMEM
 	help
 	  This option enables the generic thermal MMIO driver that will use
 	  memory-mapped reads to get the temperature.  Any HW/System that