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This commit add latest WILC1000 FW binary release v15.4. In latest
driver maintaining the API version info along with FW file name, so added
API version details in file name i.e. wilc1000_wifi_firmware-1.bin.
Signed-off-by: Ajay Singh <ajay.kathat@microchip.com>
Signed-off-by: Josh Boyer <jwboyer@kernel.org>