scsi: megaraid: Convert sysfs snprintf() to sysfs_emit()

Fix up sysfs show entries to use sysfs_emit()

Link: https://lore.kernel.org/r/20220831140325.396295-1-zhangxuezhi3@gmail.com


Reviewed-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Signed-off-by: Xuezhi Zhang <zhangxuezhi1@coolpad.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>