drivers: misc: update fsa9480 i2c driver power management

Actually this driver is using a legacy power management.
So, let's update it.

<4>[    2.576457] i2c-core: driver [fsa9480] using legacy suspend method
<4>[    2.576647] i2c-core: driver [fsa9480] using legacy resume method

Signed-off-by: Humberto Borba <humberos@gmail.com>
Change-Id: Ic15a453e38ae37788a5b4bfe57b8f0440f28206a