drivers/block/sata_dwc.c: Fix GCC 4.6 build warning

Fix:
sata_dwc.c: In function 'scan_sata':
sata_dwc.c:535:38: warning: variable 'udma_mask' set but not used
[-Wunused-but-set-variable]

Signed-off-by: Wolfgang Denk <wd@denx.de>
Cc: Kazuaki Ichinohe <kazuichi@fsi.co.jp>
1 file changed