input: ft5x06: add support when CONFIG_PM is not defined

When CONFIG_PM is not defined, there are some compilation errors,
because it introduces undeclared touch suspend and resume function.

  This patch is propagated from 3.10 kernel
    commit: 53cdd29716aa0ebb781f81e35b65b6efe7842c43
    input: ft5x06: add support when CONFIG_PM is not defined

Change-Id: I869bd41270ea240c671e5478126a61d4ff2088dc
Signed-off-by: Chun Zhang <chunz@codeaurora.org>