MIPS: Netlogic: Add basic MSI support for XLR/XLS

Add basic support for MSI.

Signed-off-by: Ganesan Ramalingam <ganesanr@netlogicmicro.com>
Signed-off-by: Jayachandran C <jayachandranc@netlogicmicro.com>
To: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/2730/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index d46f1da..04ac89c 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -776,6 +776,7 @@
 	select CEVT_R4K
 	select CSRC_R4K
 	select IRQ_CPU
+	select ARCH_SUPPORTS_MSI
 	select ZONE_DMA if 64BIT
 	select SYNC_R4K
 	select SYS_HAS_EARLY_PRINTK