RISC-V: Export kernel symbols for kvm

Export a few symbols used by kvm module. Without this, kvm cannot
be compiled as a module.
Signed-off-by: Atish Patra <atish.patra@wdc.com>
Signed-off-by: Anup Patel <anup.patel@wdc.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Alexander Graf <graf@amazon.com>
[paul.walmsley@sifive.com: updated to apply; clarified short patch
 description]
Signed-off-by: Paul Walmsley <paul.walmsley@sifive.com>

arch/riscv/kernel/smp.c

@@ -206,3 +206,4 @@ void smp_send_reschedule(int cpu)
 {
 	send_ipi_single(cpu, IPI_RESCHEDULE);
 }
+EXPORT_SYMBOL_GPL(smp_send_reschedule);

arch/riscv/kernel/time.c

@@ -9,6 +9,7 @@
 #include <asm/sbi.h>
 
 unsigned long riscv_timebase;
+EXPORT_SYMBOL_GPL(riscv_timebase);
 
 void __init time_init(void)
 {