Bluetooth: L2CAP: Fix always using RX_BUF_COUNT as initial credits

In case the channel provides its own MTU and allocator it should be
able to store as much data as set in the MTU, based on that the code
can give enough credits to fill the entire channel MTU.

Change-Id: I291cf1bb643f200bde191914e814f681f4f65c3e
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
2 files changed