Add vendor prefixes to compatible strings where they are missing.

Both the I2C and MTD framework ignore the prefix, so adding them has
no effect on backwards compatibility.
Signed-off-by: NAndrew Lunn <andrew@lunn.ch>
Link: https://lkml.kernel.org/r/1395492360-1865-6-git-send-email-andrew@lunn.chSigned-off-by: NJason Cooper <jason@lakedaemon.net>