input: synaptics_i2c_rmi4: amend error handling in wake and sleep

When device is put to suspend or resume, the correct behavior is to
restore the previous state so that correct suspend and resume behavior
is ensured in subsequent runs.

CRs-Fixed: 591072
Change-Id: I2ff52a18df948b6d8eafaf049d50829ea7968323
Signed-off-by: Chun Zhang <chunz@codeaurora.org>