Update pulp_riscv_dbg to pulp-platform/riscv-dbg@138d74b

Update code from upstream repository https://github.com/pulp-
platform/riscv-dbg to revision
138d74bcaa90c70180c12215db3776813d2a95f2

Signed-off-by: Marno van der Maas <mvdmaas+git@lowrisc.org>

vendor/pulp_riscv_dbg/src/dm_mem.sv

@@ -235,8 +235,8 @@ module dm_mem #(
     // write data in csr register
     data_valid_o   = 1'b0;
     exception      = 1'b0;
-    halted_aligned     = '0;
-    going          = 1'b0;
+    halted_aligned = 1'b1;
+    going          = 1'b1;
 
     // The resume ack signal is lowered when the resume request is deasserted
     if (clear_resumeack_i) begin
@@ -254,12 +254,6 @@ module dm_mem #(
           GoingAddr: begin
             going = 1'b1;
           end
-          ResumingAddr: begin
-            // clear the halted flag as the hart resumed execution
-            halted_d_aligned[wdata_hartsel] = 1'b0;
-            // set the resuming flag which needs to be cleared by the debugger
-            resuming_d_aligned[wdata_hartsel] = 1'b1;
-          end
           // an exception occurred during execution
           ExceptionAddr: exception = 1'b1;
           // core can write data registers
@@ -342,7 +336,7 @@ module dm_mem #(
 
     if (ndmreset_i) begin
       // When harts are reset, they are neither halted nor resuming.
-      halted_d_aligned   = '0;
+      halted_d_aligned   = 1'b1;
       resuming_d_aligned = '0;
     end
 
@@ -533,7 +527,7 @@ module dm_mem #(
 
   always_ff @(posedge clk_i or negedge rst_ni) begin
     if (!rst_ni) begin
-      halted_q   <= 1'b0;
+      halted_q   <= 1'b1;
       resuming_q <= 1'b0;
     end else begin
       halted_q   <= SelectableHarts & halted_d;