staging: fsl-mc: fix build testing on x86

Selecting GENERIC_MSI_IRQ_DOMAIN on x86 causes a compile-time error in
some configurations:

drivers/base/platform-msi.c:37:19: error: field 'arg' has incomplete type

On the other architectures, we are fine, but here we should have an additional
dependency on X86_LOCAL_APIC so we can get the PCI_MSI_IRQ_DOMAIN symbol.

Cc: stable@vger.kernel.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/fsl-mc/bus/Kconfig

@@ -7,7 +7,7 @@
 
 config FSL_MC_BUS
 	bool "QorIQ DPAA2 fsl-mc bus driver"
-	depends on OF && (ARCH_LAYERSCAPE || (COMPILE_TEST && (ARM || ARM64 || X86 || PPC)))
+	depends on OF && (ARCH_LAYERSCAPE || (COMPILE_TEST && (ARM || ARM64 || X86_LOCAL_APIC || PPC)))
 	select GENERIC_MSI_IRQ_DOMAIN
 	help
 	  Driver to enable the bus infrastructure for the QorIQ DPAA2