find7a: updated TCP buffer sizes.

Updated ReadMax and WriteMax TCP buffer sizes for HSPA data.

Signed-off-by: houst0nn <houstonn@gmail.com>
find7a: init: increase TCP buffer threshold for low throughput

TCP buffer threshold to 2097152 bytes for resolving TCP low throughput
in LTE area

Signed-off-by: houst0nn <houstonn@gmail.com>