x86/resctrl: Add arch_needs_linear to explain AMD/Intel MBA difference

The configuration values user-space provides to the resctrl filesystem
are ABI. To make this work on another architecture we want to move all
the ABI bits out of /arch/x86 and under /fs.

To do this, the differences between AMD and Intel CPUs needs to be
explained to resctrl via resource properties, instead of function
pointers that let the arch code accept subtly different values on
different platforms/architectures.

For MBA, Intel CPUs reject configuration attempts for non-linear
resources, whereas AMD ignore this field as its MBA resource is never
linear. To merge the parse/validate functions we need to explain
this difference.

Add arch_needs_linear to indicate the arch code needs the linear
property to be true to configure this resource. AMD can set this
and delay_linear to false. Intel can set arch_needs_linear
to true to keep the existing "No support for non-linear MB domains"
error message for affected platforms.

Signed-off-by: James Morse <james.morse@arm.com>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Reviewed-by: Babu Moger <babu.moger@amd.com>

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An alternative to this is for Intel non-linear MBA resources to
clear alloc_capable as they can't be configured anyway.