nfc: pn544: constify i2c_device_id
i2c_device_id are not supposed to change at runtime. All functions working with i2c_device_id provided by <linux/i2c.h> work with const i2c_device_id. So mark the non-const structs as const. Signed-off-by: NArvind Yadav <arvind.yadav.cs@gmail.com> Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>
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