Revert "serial: 8250: Fix restoring termios speed after suspend"

This reverts commit 8f740c11 which is
commit 379a3378 upstream.

It breaks the build due to a dependant upstream patch being reverted
earlier in the Android tree because of ABI breakages and it not being
needed at all.  So it is safe to remove here as well.

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: Ibc77017d0655165eb6962bf722c7cbbd8cc17480