ext2: Make ext2_params_spec static

It isn't used outside of fs/ext2/super.c.

Reported-by: kernel test robot <lkp@intel.com>
Fixes: eab61d3 ("ext2: convert to the new mount API")
Signed-off-by: Jan Kara <jack@suse.cz>

Author: jankara

fs/ext2/super.c

@@ -442,7 +442,7 @@ static const struct constant_table ext2_param_errors[] = {
 	{}
 };
 
-const struct fs_parameter_spec ext2_param_spec[] = {
+static const struct fs_parameter_spec ext2_param_spec[] = {
 	fsparam_flag	("bsddf", Opt_bsd_df),
 	fsparam_flag	("minixdf", Opt_minix_df),
 	fsparam_flag	("grpid", Opt_grpid),