staging: sm750fb: Add space before switch statement

This patch fixes the checkpatch.pl warnings:

ERROR: space required before the open parenthesis '('
+               switch(divisor) {

ERROR: space required before the open parenthesis '('
+               switch(divisor) {

ERROR: space required before the open parenthesis '('
+       switch(reg) {

Signed-off-by: Helen Fornazier <helen.fornazier@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>