kcm: do not sense pfmemalloc status in kcm_sendpage()

kcm: do not sense pfmemalloc status in kcm_sendpage()

[ Upstream commit ee15e1f38dc201fa7d63c13aa258b728dce27f4d ]

Similar to changes done in TCP in blamed commit.
We should not sense pfmemalloc status in sendpage() methods.

Fixes: 326140063946 ("tcp: TX zerocopy should not sense pfmemalloc status")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Link: https://lore.kernel.org/r/20221027040637.1107703-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>