staging: sm750fb: Fixed no space and indent warns

This patch fixes the no spaces and indent warnings identified by the
checkpath.pl script for the entire ddk750_chip.c file by using
appropriate tab spaces and indents accordingly.
Signed-off-by: Ragavendra Nagraj <ragavendra.bn@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>