lp8727_charger: Coding style changes

1. Useless braces were omitted
2. Useless void casts were omitted
3. module exit name changed
   lp8727_chg_exit -> lp8727_exit
4. Pointer coding style changes
   no space between pointer('*') and pointer name
   ex) u8 * data -> u8 *data
5. Author information change : email and additional author

Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com>
Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>