defconfig: msm8960: disable LEGACY_PTYS

Disable legacy pseudo terminal (PTY) support that is not in use. This
improves boot up time as it avoids creating all the pty and ttyp devices.

Change-Id: I9e988b87ddfa1fa1822c03741a61de27a68662d5
Signed-off-by: Jin Hong <jinh@codeaurora.org>
2 files changed