i2c: Fix THIS_MODULE error
#modified:   include/linux/i2c.h
drivers/misc/ak8975.c:429:11: error: 'THIS_MODULE' undeclared here (not in a function)

drivers/misc/ak8975.c:690:20: error: expected declaration specifiers or '...' before string constant

drivers/misc/ak8975.c:691:16: error: expected declaration specifiers or '...' before string constant

Signed-off-by: cholokei <leesl0416@naver.com>