thermal: fix mtk_thermal build dependency

Fix build errors when MTK_THERMAL=y and NVMEM=m by preventing that
Kconfig combination.

drivers/built-in.o: In function `mtk_thermal_probe':
mtk_thermal.c:(.text+0xffa8f): undefined reference to `nvmem_cell_get'
mtk_thermal.c:(.text+0xffabe): undefined reference to `nvmem_cell_read'
mtk_thermal.c:(.text+0xffac9): undefined reference to `nvmem_cell_put'

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Zhang Rui <rui.zhang@intel.com>
Cc: Eduardo Valentin <edubezval@gmail.com>
Cc: <linux-pm@vger.kernel.org>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Hanyi Wu <hanyi.wu@mediatek.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig
index c37eedc35a24..5c7711091964 100644
--- a/drivers/thermal/Kconfig
+++ b/drivers/thermal/Kconfig
@@ -376,6 +376,7 @@ config MTK_THERMAL
         tristate "Temperature sensor driver for mediatek SoCs"
         depends on ARCH_MEDIATEK || COMPILE_TEST
         depends on HAS_IOMEM
+        depends on NVMEM || NVMEM=n
         default y
         help
           Enable this option if you want to have support for thermal management