2.5.69: mtrr: MTRR 2 not used, Bug #564

This one-liner fixes the mtrr not used bug, and addresses Bug #564 of Bugzilla.

mtrr_file_del was not decreasing the mtrr usage count so when XFree86 was exiting, mtrr_close was trying to delete an already deleted memory type region with the freed mtrr.

Index: arch/i386/kernel/cpu/mtrr/if.c
===================================================================
RCS file: /home/faiku/cvs/linux-2.5/arch/i386/kernel/cpu/mtrr/if.c,v retrieving revision 1.1.1.1

diff -u -r1.1.1.1 if.c
@@ -49,7 +49,7 @@
              struct file *file, int page)
 {
        int reg;
-       unsigned int *fcount = file->private_data;
+       unsigned int *fcount = FILE_FCOUNT(file);
 
        if (!page) {
                if ((base & (PAGE_SIZE - 1)) || (size & (PAGE_SIZE - 1)))