[MIPS] Cleanup inode->r_dev usage.
    
imajor()/iminor() should be used instead of accessing r_dev directly.

Based on patch from Eric Sesterhenn (snakebyte@gmx.de).
    
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/kernel/vpe.c b/arch/mips/kernel/vpe.c
index 80ffaa6..85d7df7 100644
--- a/arch/mips/kernel/vpe.c
+++ b/arch/mips/kernel/vpe.c
@@ -1072,7 +1072,7 @@
 	struct vpe_notifications *not;
 
 	/* assume only 1 device at the mo. */
-	if ((minor = MINOR(inode->i_rdev)) != 1) {
+	if ((minor = iminor(inode)) != 1) {
 		printk(KERN_WARNING "VPE loader: only vpe1 is supported\n");
 		return -ENODEV;
 	}
@@ -1133,7 +1133,7 @@
 	struct vpe *v;
 	Elf_Ehdr *hdr;
 
-	minor = MINOR(inode->i_rdev);
+	minor = iminor(inode);
 	if ((v = get_vpe(minor)) == NULL)
 		return -ENODEV;
 
@@ -1174,7 +1174,7 @@
 	size_t ret = count;
 	struct vpe *v;
 
-	minor = MINOR(file->f_dentry->d_inode->i_rdev);
+	minor = iminor(file->f_dentry->d_inode);
 	if ((v = get_vpe(minor)) == NULL)
 		return -ENODEV;