msm: kgsl: Fix CONFIG_QCOM_LLCC compilation issues

If CONFIG_QCOM_LLCC isn't enabled then the KGSL will fail
to build. Fix this by moving the #define check and fixing
a function prototype.

Change-Id: Ie2a00e18b920f9f823fdb921cf6dc4a3be3913ae
Signed-off-by: Carter Cooper <ccooper@codeaurora.org>