msm: kgsl: Add facility to limit max GPU power level jump

Some devices are not stable in below two scenarios
i)  Previous power level is below restrict-pwrlevel
    and new level is max pwrlevel
ii) Wake up gpu at max power level

Add a facility to overwrite max power level value with the
restrict_pwrlevel, if it is enabled through device tree property.

CRs-Fixed: 1110516
Change-Id: I02391d656450d850e603e94d3538522318e413a9
Signed-off-by: Hareesh Gundu <hareeshg@codeaurora.org>