defconfig: msm: disable CONFIG_LEGACY_PTYS for perf

LEGACY_PTYS enables pseudo terminal (PTY) legacy devices.This will
increase the udev scan time.Disable it in perf build.

Change-Id: Ia853902c522a4b3999ed001943623754b027a7fe
Signed-off-by: Wen Yang <wya@codeaurora.org>
1 file changed