msm: kgsl: remove or fix badly formated printk messages

Remove allocation failure errors, since we'll already get
plenty of notice from the kernel when this happens.

Use %zu when printing size_t values for portability.

Change-Id: I746043bd12116066e6b3c07a5fcabcbc9b00dba9
Signed-off-by: Jeremy Gebben <jgebben@codeaurora.org>