Staging: sm750fb: Inserted spaces after commas in four files.

Insert Spaces after commas to rectify the
following checkpatch errors in sm750_cursor.h,
sm750_accel.h, ddk750_power.h and ddk750_mode.h:
ERROR: space required after that ','

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