[PATCH] firmware: stratix10-svc: build only on 64-bit ARM

[Dinh Nguyen]

From: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxxxxx>

The Stratix10 service layer and RCU drivers are useful only on
Stratix10, so on ARMv8.  Compile testing the RCU driver on 32-bit ARM
fails:

  drivers/firmware/stratix10-rsu.c: In function 'rsu_status_callback':
  include/linux/compiler_types.h:320:38: error: call to '__compiletime_assert_179'
    declared with attribute error: FIELD_GET: type of reg too small for mask
    _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
  ...
  drivers/firmware/stratix10-rsu.c:96:26: note: in expansion of macro 'FIELD_GET'
    priv->status.version = FIELD_GET(RSU_VERSION_MASK,

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxxxxx>
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Acked-by: Richard Gong <richard.gong@xxxxxxxxxxxxxxx>
Signed-off-by: Dinh Nguyen <dinguyen@xxxxxxxxxx>
---
 drivers/firmware/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/firmware/Kconfig b/drivers/firmware/Kconfig
index 6a4e882e448d..08bd4d01fb04 100644
--- a/drivers/firmware/Kconfig
+++ b/drivers/firmware/Kconfig
@@ -206,7 +206,7 @@ config FW_CFG_SYSFS_CMDLINE
 
 config INTEL_STRATIX10_SERVICE
 	tristate "Intel Stratix10 Service Layer"
-	depends on ARCH_INTEL_SOCFPGA && HAVE_ARM_SMCCC
+	depends on ARCH_INTEL_SOCFPGA && ARM64 && HAVE_ARM_SMCCC
 	default n
 	help
 	  Intel Stratix10 service layer runs at privileged exception level,
-- 
2.25.1