board/lubbock/flash.c: Fix GCC 4.6 warnings

Fix:
flash.c: In function 'flash_erase':
flash.c:223:6: warning: variable 'flag' set but not used [-Wunused-but-set-variable]
flash.c: In function 'write_data':
flash.c:392:6: warning: variable 'flag' set but not used [-Wunused-but-set-variable]

Signed-off-by: Anatolij Gustschin <agust@denx.de>
1 file changed