iris: update depth value for stages after fast clear depth

This should fix an outdated depth value visible from the shader side.

v1: (Nanley Chery)
- fix commit message

v2: (Nanley Chery)
- replace `fixes` tag by `mesa-stable`

Closes: #3883
Cc: 20.3 20.2 <mesa-stable>
Reviewed-by: Nanley Chery <nanley.g.chery@intel.com>
Signed-off-by: Andrii Simiklit <andrii.simiklit@globallogic.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7838>
(cherry picked from commit bdd09066fa5f022daa0428325a04a52d66b5e41b)
2 files changed