sw64: kvm: expand the number of SWVM_IRQS

Sunway inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I5PN9S

--------------------------------

As more devices are hot-plugged in a guest os, it will fail to respond
interrupts because of insufficient interrupt resource and appear to be
stuck.

To fix this issue, expand the maximum number of irq supported to 256.
Signed-off-by: NDu Yilong <duyilong@wxiat.com>
Signed-off-by: NGu Zitao <guzitao@wxiat.com>

arch/sw_64/include/uapi/asm/kvm.h

@@ -5,7 +5,7 @@
 /*
  * KVM SW specific structures and definitions.
  */
-#define SWVM_IRQS 64
+#define SWVM_IRQS 256
 enum SW64_KVM_IRQ {
 	SW64_KVM_IRQ_IPI = 27,
 	SW64_KVM_IRQ_TIMER = 9,