msm: kgsl: Remove unneeded parameters for the sharedmem funcs

We do not need to pass a struct kgsl_device pointer to
kgsl_sharedmem_writel and kgsl_sharedmem_writeq which makes life slightly
easier when we don't have to worry about dereferencing pointers. The same
goes for kgsl_sharedmem_set too but that function is only used twice and
can be easily replaced by a memset() so just do that instead.

Change-Id: Ic0dedbadef4bfef8da9bf4c89a6a36e27e6f7da5
Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>