etnaviv: fix late Z with MSAA
On RA_WRITE_DEPTH GPUs the RA stage needs to be told that MSAA is active when the PE Z/S stage is needed. Not sure what it does exactly, but this fixes broken late Z on those GPUs when performing MSAA rendering.
On RA_WRITE_DEPTH GPUs the RA stage needs to be told that MSAA is active when the PE Z/S stage is needed. Not sure what it does exactly, but this fixes broken late Z on those GPUs when performing MSAA rendering.