lima: adjust pp and gp max const buffer size

lima: adjust pp and gp max const buffer size

According to the mali driver output, the Mali-400 GP provides space for
304 vec4 uniforms, globals and temporary variables.

The Mali-PP supports a uniform table up to size 32768 total.
However, indirect access to an uniform only supports indices up to 8192
(a 2048 vec4 array). Trying to access beyond that currently causes a pp
job timeout with both lima and the mali driver. To prevent indices
bigger than that in application uniforms, limit to 8192 for now.

Signed-off-by: Erico Nunes <nunes.erico@gmail.com>
Reviewed-by: Vasily Khoruzhick <anarsoul@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8079>