msm: kgsl: Set up the adreno device at runtime

Instead of doing the adreno device setup at compile time with some ugly
macros, do it at the beginning of device probe. This allows us to retry
probe without having to worry about coming back through probe with a
partially modified data structure.

Change-Id: Ic0dedbad09fa37e2a1a8161e7d54c676d42151e8
Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>