msm_serial_hs_lite: Fix compilation with console disabled

Stub out get_console_state if the console feature is turned
off to prevent a compilation warning in debug code.

Change-Id: Iad3d9303850bedd56db0ffc6f08dc5e8c9442373
Signed-off-by: Stepan Moskovchenko <stepanm@codeaurora.org>