msm: smd_tty: fix section mismatch

A few methods specified with the __init flag can potentially be called
by methods that don't specify the __init flag. This poses a problem,
since the methods specified by the __init flag are freed after
initialization time.

Remove the __init flag from the methods that can be called after
initialization time.

Change-Id: I0e5d11b937922759b8962955efcc8f68ca849dbc
Signed-off-by: Brent Hronik <bhronik@codeaurora.org>