page_pool: remove PP_FLAG_PAGE_FRAG

page_pool: remove PP_FLAG_PAGE_FRAG

PP_FLAG_PAGE_FRAG is not really needed after pp_frag_count
handling is unified and page_pool_alloc_frag() is supported
in 32-bit arch with 64-bit DMA, so remove it.

Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
CC: Lorenzo Bianconi <lorenzo@kernel.org>
CC: Alexander Duyck <alexander.duyck@gmail.com>
CC: Liang Chen <liangchen.linux@gmail.com>
CC: Alexander Lobakin <aleksander.lobakin@intel.com>
Link: https://lore.kernel.org/r/20231020095952.11055-3-linyunsheng@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
(cherry picked from commit 09d96ee5674a0eaa800c664353756ecc45c4a87f)
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Change-Id: I5d7223d1cb9baefea5c7e86f9a4de3e972c04a4a