Add stub for fetching bootargs for Qemu ARM virt

Currently unused but when rootfs is enabled
we should get this error and quickly narrow down
where to add proper bootargs handling.

Signed-off-by: Zbigniew Bodek <zbigniew.bodek@huawei.com>
Change-Id: Ie8d96fc3b6ad7cc33abe67530ca8ff9526b46855

kernel/common/los_rootfs.c

@@ -232,6 +232,17 @@ STATIC INT32 GetArgs(CHAR **args)
     }
 #endif
 
+#ifdef LOSCFG_PLATFORM_QEMU_ARM_VIRT_CA7
+    /*
+     * TODO: Implement method of fetching bootargs for
+     *       Qemu ARM virtual platform. If used without
+     *       bootloader it will pass DTB by default.
+     */
+    (void)ret;
+    PRINT_ERR("Fetching bootargs unimplemented.\n");
+    goto ERROUT;
+#endif
+
     for (i = 0; i < COMMAND_LINE_SIZE; i += len + 1) {
         len = strlen(cmdLine + i);
         tmp = strstr(cmdLine + i, bootargName);