mlx4_core: scale_profile should work without params set to 0

mlx4_core: scale_profile should work without params set to 0

The "scale_profile" parameter is to be used to do scaling of
hca params without requiring specific tuning setting for each
one of them individually and yet allowing manual setting of
variables.

In UEK2, the module params were default zero and initialized
later from a "driver default" or a scale_profile dictated value.

In UEK4 (derived from Mellanox OFED 2.4) module params were
pre-initialized to default values and are not zero and have
to be forced to 0 for dynamic scaling to be activated.
This defeats the purpose of having a single parameter to achieve
scaling and not requiring setting individual parameters (while
retaining ability to revert to driver defaults).

The changes here (re)introduce a separate static instance
containing default parameters separate from module parameters
which are pre-initialized to zero for parameters that can scale
dynamically and to default values for others. The zero module
parameters are later initialized to either a scale_profile
governed value or driver defaults.

Orabug: 23078816

Signed-off-by: Mukesh Kacker <mukesh.kacker@oracle.com>
Reviewed-by: Wengang Wang <wen.gang.wang@oracle.com>
Reviewed-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>