riscv: Enable GENERIC_IRQ_SHOW_LEVEL

The interrupt controllers on riscv support both edge and level triggered
interrupts, it's useful to provide that information in /proc/interrupts.

Signed-off-by: Kefeng Wang <[email protected]>
Signed-off-by: Palmer Dabbelt <[email protected]>

arch/riscv/Kconfig

@@ -52,6 +52,7 @@ config RISCV
 	select GENERIC_IOREMAP
 	select GENERIC_IRQ_MULTI_HANDLER
 	select GENERIC_IRQ_SHOW
+	select GENERIC_IRQ_SHOW_LEVEL
 	select GENERIC_LIB_DEVMEM_IS_ALLOWED
 	select GENERIC_PCI_IOMAP
 	select GENERIC_PTDUMP if MMU