drm/i915/guc: Fix capture size warning and bump the size

drm/i915/guc: Fix capture size warning and bump the size

There was a size check to warn if the GuC error state capture buffer
allocation would be too small to fit a reasonable amount of capture
data for the current platform. Unfortunately, the test was done too
early in the boot sequence and was actually testing 'if(-ENODEV >
size)'.

Move the check to be later. The check is only used to print a warning
message, so it doesn't really matter how early or late it is done.
Note that it is not possible to dynamically size the buffer because
the allocation needs to be done before the engine information is
available (at least, it would be in the intended two-phase GuC init
process).

Now that the check works, it is reporting size too small for newer
platforms. The check includes a 3x oversample multiplier to allow for
multiple error captures to be bufferd by GuC before i915 has a chance
to read them out. This is less important than simply being big enough
to fit the first capture.

So a) bump the default size to be large enough for one capture minimum
and b) make the warning only if one capture won't fit, instead use a
notice for the 3x size.

Note that the size estimate is a worst case scenario. Actual captures
will likely be smaller.

Lastly, use drm_warn istead of DRM_WARN as the former provides more
infmration and the latter is deprecated.

Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Reviewed-by: Alan Previn <alan.previn.teres.alexis@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220728022028.2190627-3-John.C.Harrison@Intel.com