scsi: lpfc: Define size of debugfs entry for xri rebalancing

To assist in debugging lpfc_xri_rebalancing driver parameter, a debugfs
entry is used.  The debugfs file operations for xri rebalancing have
been previously implemented, but lack definition for its information
buffer size.  Similar to other pre-existing debugfs entry buffers,
define LPFC_HDWQINFO_SIZE as 8192 bytes.

Signed-off-by: Justin Tee <justin.tee@broadcom.com>
Message-ID: <20250915180811.137530-9-justintee8345@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>