mfd: compile fix for twl4030 renaming

mfd: compile fix for twl4030 renaming

Caused by commit 0b83ddebc6e884dc0221358cf68c461520fbdd8e ("MFD:
twl4030: add twl4030_codec MFD as a new child to the core") interacting
with commit b07682b6056eb6701f8cb86aa5800e6f2ea7919b ("mfd: Rename
twl4030* driver files to enable re-use").

This file seems to have been missed in the renaming.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Acked-by: Peter Ujfalusi <peter.ujfalusi@nokia.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>