d4xx: fix dfu release warning

[dmipx]

Excessive Warning message of "no communication with d4xx" and App startup delay

https://elixir.bootlin.com/linux/latest/source/drivers/base/regmap/regmap.c#L2850

/**
 * regmap_raw_read() - Read raw data from the device
 *
 * @map: Register map to read from
 * @reg: First register to be read from
 * @val: Pointer to store read value
 * @val_len: Size of data to read
 *
 * A value of zero will be returned on success, a negative errno will
 * be returned in error cases.
 */

Tracked-by: [RSDSO-19607]

Reported-by: Yusheng Hsu yusheng.hsu@intel.com