Add LCOFI priority info for HS-mode (riscv#1678) (riscv#1679)

Author: demin-han

src/hypervisor.adoc

@@ -502,7 +502,7 @@ is an alias (writable) of the same bit in `hvip`.
 
 Multiple simultaneous interrupts destined for HS-mode are handled in the
 following decreasing priority order: SEI, SSI, STI, SGEI, VSEI, VSSI,
-VSTI.
+VSTI, LCOFI.
 
 [[hgeinterruptregs]]
 ==== Hypervisor Guest External Interrupt Registers (`hgeip` and `hgeie`)