etnaviv: Fix disabling early-z rejection on GC7000L (HALTI5)

etnaviv: Fix disabling early-z rejection on GC7000L (HALTI5)

The VIVS_PE_DEPTH_CONFIG_DISABLE_ZS in PE_DEPTH_CONFIG caused depth
write hangs on HALTI5.
This is because the 0x11000000 bits in RA have to be toggled on
when setting this bit to zero. This combination will disable
early-z rejection on GC7000L, which was previously done through
a different bit.
Tested only on GC7000L so far.

Signed-off-by: Lukas F. Hartmann <lukas@mntre.com>
Reviewed-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5456>