The m68k gdbstub SR reg request doesnt include Condition-Codes

The register request via gdbstub would return the SR part
which contains the Trace/Master/IRQ state flags, but
would be missing the CR (Condition Register) state bits.

This fix adds this support by merging them in the m68k
specific gdbstub handler m68k_cpu_gdb_read_register for SR register.

Signed-off-by: Lucien Murray-Pitts <lucienmp.qemu@gmail.com>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20190609105154.GA16755@localhost.localdomain>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>

target/m68k/gdbstub.c

@@ -35,7 +35,8 @@ int m68k_cpu_gdb_read_register(CPUState *cs, uint8_t *mem_buf, int n)
     } else {
         switch (n) {
         case 16:
-            return gdb_get_reg32(mem_buf, env->sr);
+            /* SR is made of SR+CCR, CCR is many 1bit flags so uses helper */
+            return gdb_get_reg32(mem_buf, env->sr | cpu_m68k_get_ccr(env));
         case 17:
             return gdb_get_reg32(mem_buf, env->pc);
         }