powerpc/perf: Handle sdar_mode for marked event in power9

powerpc/perf: Handle sdar_mode for marked event in power9

commit 78b4416aa249365dd3c1b64da4d3a232014320b0 upstream.

MMCRA[SDAR_MODE] specifices how the SDAR should be updated in
continous sampling mode. On P9 it must be set to 0b00 when
MMCRA[63] is set.

Fixes: c7c3f568beff2 ('powerpc/perf: macros for power9 format encoding')
Signed-off-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>