Bluetooth: L2CAP: Fix l2cap_global_chan_by_psm

stable inclusion
from stable-v5.10.156
commit bd487932408d462ed86b10833da35c61f618f62f
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I7MCG1

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=bd487932408d462ed86b10833da35c61f618f62f



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[ Upstream commit f937b758 ]

l2cap_global_chan_by_psm shall not return fixed channels as they are not
meant to be connected by (S)PSM.

Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Reviewed-by: Tedd Ho-Jeong An <tedd.an@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: sanglipeng <sanglipeng1@jd.com>