Staging: sm750fb: ddk750_swi2c.c: Replace spaces with tabs

Replace spaces with tabs in ddk750_swi2c.c to
rectify the following checkpatch warnings:
WARNING: please, no spaces at the start of a line

Signed-off-by: Isaac Assegai <isaac.a.travers@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>