wlcore: use GFP_KERNEL together with GFP_DMA
GFP_DMA should not be used by itself, it still needs GFP_KERNEL or
such. Fix two occurrences of allocations with GFP_DMA only.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Luciano Coelho <coelho@ti.com>