generic-loader: file: Only set a PC if a CPU is specified

This patch fixes the generic-loader file loading to only set the program
counter if a CPU is specified. This follows what is written in the
documentation and was always part of the original intention.
Signed-off-by: NAlistair Francis <alistair.francis@xilinx.com>
Reviewed-by: NEdgar E. Iglesias <edgar.iglesias@xilinx.com>
Message-id: 537bf4d08be7acf7a89b590cff69e19db7f0a6cd.1478908712.git.alistair.francis@xilinx.com
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

hw/core/generic-loader.c

@@ -93,7 +93,12 @@ static void generic_loader_realize(DeviceState *dev, Error **errp)
                        "image");
             return;
         }
-        s->set_pc = true;
+        /* The user specified a file, only set the PC if they also specified
+         * a CPU to use.
+         */
+        if (s->cpu_num != CPU_NONE) {
+            s->set_pc = true;
+        }
     } else if (s->addr) {
         /* User is setting the PC */
         if (s->data || s->data_len || s->data_be) {