arch/risc-v/src/common/riscv_initialstate.c: Fix stack pointer in coloration

The logical CPU index should be retrieved with up_cpu_index(); the
riscv_mhartid() returns the actual hart id of the SoC.

For mpfs target for example, NuttX can run on a single HART, for example on mhartid 2, but there is still just one logical CPU for the NuttX.

Signed-off-by: Jukka Laitinen <[email protected]>

Author: Jukka Laitinen

arch/risc-v/src/common/riscv_initialstate.c

@@ -97,7 +97,7 @@ void up_initial_state(struct tcb_s *tcb)
 
   if (tcb->pid == IDLE_PROCESS_ID)
     {
-      tcb->stack_alloc_ptr = (void *)g_cpux_idlestack(riscv_mhartid());
+      tcb->stack_alloc_ptr = (void *)g_cpux_idlestack(up_cpu_index());
       tcb->stack_base_ptr  = tcb->stack_alloc_ptr;
       tcb->adj_stack_size  = SMP_STACK_SIZE;