[PATCH] watchdog: simatic: add PCI dependency

[Arnd Bergmann <arnd@kernel.org>]

From: Arnd Bergmann <arnd@arndb.de>

The simatic-ipc driver no longer depends on PCI, but its watchdog portion
still needs it, otherwise P2SB runs into a build  failure:

WARNING: unmet direct dependencies detected for P2SB
  Depends on [n]: PCI [=n] && X86 [=y]
  Selected by [m]:
  - SIEMENS_SIMATIC_IPC_WDT [=m] && WATCHDOG [=y] && SIEMENS_SIMATIC_IPC [=y]

drivers/platform/x86/p2sb.c:121:3: error: call to undeclared function 'pci_bus_write_config_dword'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
                pci_bus_write_config_dword(bus, devfn_p2sb, P2SBC, 0);

Add back the minimum dependendency to make it build in random configurations
again.

Fixes: b72da71ce24b0 ("platform/x86: simatic-ipc: drop PCI runtime depends and header")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/watchdog/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
index 04e9b40cf7d53..09452384221a4 100644
--- a/drivers/watchdog/Kconfig
+++ b/drivers/watchdog/Kconfig
@@ -1680,7 +1680,7 @@ config NIC7018_WDT
 
 config SIEMENS_SIMATIC_IPC_WDT
 	tristate "Siemens Simatic IPC Watchdog"
-	depends on SIEMENS_SIMATIC_IPC
+	depends on SIEMENS_SIMATIC_IPC && PCI
 	default y
 	select WATCHDOG_CORE
 	select P2SB
-- 
2.39.2