SYSLINK: ipc - fix in platform_mem.

This patch fixes an issue found in platform.c where we were not
unlocking "platform_mem_state.gate" in case of a ioremap() failure.
Signed-off-by: Jayan John <x00jayan@ti.com>

drivers/dsp/syslink/multicore_ipc/platform_mem.c

@@ -174,7 +174,7 @@ int platform_mem_map(memory_map_info *map_info)
 
 	if (map_info->dst == 0) {
 			retval = -EFAULT;
-			goto exit;
+			goto ioremap_fail;
 	}
 
 	/* Populate the info */
@@ -186,9 +186,10 @@ int platform_mem_map(memory_map_info *map_info)
 	mutex_unlock(platform_mem_state.gate);
 	goto exit;
 
+ioremap_fail:
+	mutex_unlock(platform_mem_state.gate);
 lock_fail:
 	kfree(info);
-
 exit:
 	return retval;
 }
@@ -234,7 +235,6 @@ int platform_mem_unmap(memory_unmap_info *unmap_info)
 			kfree(info);
 			break;
 		}
-
 	}
 	mutex_unlock(platform_mem_state.gate);