Used to enable access to the pci rom display
ssize_t pci_write_rom(struct file * filp, struct kobject * kobj, struct bin_attribute * bin_attr, char * buf, loff_t off, size_t count);
filp
sysfs file
kobj
kernel object handle
bin_attr
struct bin_attribute for this file
buf
user input
off
file offset
count
number of byte in input
writing anything except 0 enables it