kernel: set regmap-core module license

kernel: set regmap-core module license

Fixes the following issues:
[    7.660000] regmap_core: module license 'unspecified' taints kernel
[    7.690000] Disabling lock debugging due to kernel
[    7.700000] regmap_core: Unknown symbol lzo1x_decompress_safe (err 0
[    7.710000] regmap_core: Unknown symbol lzo1x_1_compress (err 0
[    7.720000] regmap_core: Unknown symbol devres_add (err 0
[    7.730000] regmap_core: Unknown symbol debugfs_create_bool (err 0
[    7.750000] regmap_core: Unknown symbol devres_alloc (err 0
[    7.760000] regmap_core: Unknown symbol debugfs_remove_recursive (err 0
[    7.770000] regmap_core: Unknown symbol debugfs_create_file (err 0
[    7.780000] regmap_core: Unknown symbol devres_free (err 0
[    7.800000] regmap_core: Unknown symbol devres_find (err 0
[    7.810000] regmap_core: Unknown symbol debugfs_create_dir (err 0)

Signed-off-by: Florian Fainelli <florian@openwrt.org>
SVN-Revision: 36070