Switch the setting of psl_fir_cntl from debug to production
environment recommended value. It mostly affects the PSL behavior when
an error is raised in psl_fir1/2.

Tested with cxlflash.
Signed-off-by: NFrederic Barrat <fbarrat@linux.vnet.ibm.com>
Reviewed-by: NUma Krishnan <ukrishn@linux.vnet.ibm.com>
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>