When CONFIG_THERMAL is enabled as a loadable module, and etnaviv is
built-in, we get a link error:

drivers/gpu/drm/etnaviv/etnaviv_gpu.o: In function `etnaviv_gpu_bind':
etnaviv_gpu.c:(.text.etnaviv_gpu_bind+0x34): undefined reference to 
`thermal_of_cooling_device_register'
etnaviv_gpu.c:(.text.etnaviv_gpu_bind+0xe0): undefined reference to 
`thermal_cooling_device_unregister'
drivers/gpu/drm/etnaviv/etnaviv_gpu.o: In function `etnaviv_gpu_unbind':
etnaviv_gpu.c:(.text.etnaviv_gpu_unbind+0xf0): undefined reference to 
`thermal_cooling_device_unregister'

This adds a Kconfig dependency to prevent etnaviv from being built-in
with CONFIG_THERMAL=m, while still allowing the valid configurations.
Unfortunately, simply adding the dependency here breaks Kconfig through
a dependency loop involving lots of symbols all the way until ACPI_VIDEO,
which is the only video driver that explicitly selects 'THERMAL'. Turning
this into a 'depends on' addresses the problem.
For completeness, I'm also removing the redundant 'select THERMAL'
from INTEL_MENLOW, so no other driver uses that statement.

Fixes: bcdfb5e56dc5 ("drm/etnaviv: add etnaviv cooling device")
Signed-off-by: Arnd Bergmann <a...@arndb.de>
---
 drivers/acpi/Kconfig            | 2 +-
 drivers/gpu/drm/etnaviv/Kconfig | 1 +
 drivers/platform/x86/Kconfig    | 1 -
 3 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
index 03cc4e74096b..252399efa8b3 100644
--- a/drivers/acpi/Kconfig
+++ b/drivers/acpi/Kconfig
@@ -184,7 +184,7 @@ config ACPI_VIDEO
        tristate "Video"
        depends on X86 && BACKLIGHT_CLASS_DEVICE
        depends on INPUT
-       select THERMAL
+       depends on THERMAL
        help
          This driver implements the ACPI Extensions For Display Adapters
          for integrated graphics devices on motherboard, as specified in
diff --git a/drivers/gpu/drm/etnaviv/Kconfig b/drivers/gpu/drm/etnaviv/Kconfig
index 71cee4e9fefb..1d6c744e7924 100644
--- a/drivers/gpu/drm/etnaviv/Kconfig
+++ b/drivers/gpu/drm/etnaviv/Kconfig
@@ -3,6 +3,7 @@ config DRM_ETNAVIV
        tristate "ETNAVIV (DRM support for Vivante GPU IP cores)"
        depends on DRM
        depends on ARCH_MXC || ARCH_DOVE || (ARM && COMPILE_TEST)
+       depends on THERMAL || THERMAL=n
        depends on MMU
        select SHMEM
        select SYNC_FILE
diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
index e229ea317b9c..76ced87efde5 100644
--- a/drivers/platform/x86/Kconfig
+++ b/drivers/platform/x86/Kconfig
@@ -544,7 +544,6 @@ config SENSORS_HDAPS
 config INTEL_MENLOW
        tristate "Thermal Management driver for Intel menlow platform"
        depends on ACPI_THERMAL
-       select THERMAL
        ---help---
          ACPI thermal management enhancement driver on
          Intel Menlow platform.
-- 
2.9.0

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