i2c: mv64xxx: refactor send_start
i2c: mv64xxx: refactor send_start

For start and restart, we are doing the same thing. Let's consolidate
that.

Tested-by: Maxime Ripard <2d324f4ca95610bde432fa2af2f28cd21110687d@free-electrons.com>
Signed-off-by: Wolfram Sang <fd4ce474653598159cad06f3c83387a05cd53a44@the-dreams.de>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs