Since the hwspinlock core has changed the PM runtime to be optional, thus
remove the redundant PM runtime implementation in the u8500 HWSEM driver.
Reviewed-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NBaolin Wang <baolin.wang@linaro.org>
Signed-off-by: NBjorn Andersson <bjorn.andersson@linaro.org>