fs/compat_ioctl.c: fix build error when !BLOCK

No driver uses SG_SET_TRANSFORM any more in Linux, since the ide-scsi
driver was removed in 2.6.29. The compat-ioctl cleanup series moved
the handling for this around, which broke building without CONFIG_BLOCK.

Just remove the code handling it for compat mode.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/compat_ioctl.c b/fs/compat_ioctl.c
index 14cbc83..332dd00 100644
--- a/fs/compat_ioctl.c
+++ b/fs/compat_ioctl.c
@@ -1600,8 +1600,6 @@
 	case KDSKBMETA:
 	case KDSKBLED:
 	case KDSETLED:
-	/* SG stuff */
-	case SG_SET_TRANSFORM:
 	/* AUTOFS */
 	case AUTOFS_IOC_READY:
 	case AUTOFS_IOC_FAIL: