drm/xe/xe_survivability: Redesign survivability mode

drm/xe/xe_survivability: Redesign survivability mode

Redesign survivability mode to have only one value per file.

1) Retain the survivability_mode sysfs to indicate the type

	cat /sys/bus/pci/devices/0000\:03\:00.0/survivability_mode
	(Boot / Runtime)

2) Add survivability_info directory to expose boot breadcrumbs.
Entries in survivability mode sysfs are only visible when
boot breadcrumb registers are populated.

	/sys/bus/pci/devices/0000:03:00.0/survivability_info
	├── aux_info0
	├── aux_info1
	├── aux_info2
	├── aux_info3
	├── aux_info4
	├── capability_info
	├── postcode_trace
	└── postcode_trace_overflow

Capability Info:

	Provides data about boot status and has bits that
	indicate the support for the other breadcrumbs

Postcode Trace / Postcode Trace Overflow :

	Each postcode is represented as an 8-bit value and represents
	a boot failure event. When a new failure event is logged by Pcode
	the existing postcodes are shifted left. These entries provide a
	history of 8 postcodes.

Auxiliary Info:

	Some failures have additional debug information.

Signed-off-by: Riana Tauro <riana.tauro@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patch.msgid.link/20251208084539.3652902-5-riana.tauro@intel.com
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>