The napi_alloc_frag_align() will guarantee that a correctly align
buffer address is returned. So use this function to simplify the buffer
alloc and avoid the unnecessary memory waste.
Signed-off-by: NKevin Hao <haokexin@gmail.com>
Tested-by: NSubbaraya Sundeep <sbhatta@marvell.com>
Signed-off-by: NJakub Kicinski <kuba@kernel.org>