anv: handle errors in emit_binding_table() and emit_samplers()

anv: handle errors in emit_binding_table() and emit_samplers()

These can fail to allocate device memory, however, the driver can recover
from this error by allocating a new binding table block and trying again.

v2:
  - Instead of tracking the errors in these functions and making callers
    reset the batch's status before attempting to allocate a new block
    for the binding table, simply make callers responsible for setting
    the error status if they fail to allocate memory during the second
    attempt (Jason).

Reviewed-by: Topi Pohjolainen <topi.pohjolainen@intel.com>