gma500: Fix uninitialized variable and style issues
gma500: Fix uninitialized variable and style issues

The return variable of psb_gtt_pin() may be used
uninitialized. Also fixed some coding style issues.

Signed-off-by: Andre Bartke <acf3d8d5e4d1eee2da017d872ea3c537ba4d4105@gmail.com>
[Reapplied by hand due to other changes]
Signed-off-by: Alan Cox <91e38e63b890fbb214c8914809fde03c73e7f24d@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <4645f7897fd33786a2ee1264d590b3c400559d85@suse.de>

TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs