HID: intel-ish-hid: ipc: Correct fw_reset_work_fn() function name in header

Fixes the following W=1 kernel build warning(s):

 drivers/hid/intel-ish-hid/ipc/ipc.c:553: warning: expecting prototype for ish_fw_reset_work_fn(). Prototype was for fw_reset_work_fn() instead

Cc: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Cc: Jiri Kosina <jikos@kernel.org>
Cc: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Cc: Zhang Lixu <lixu.zhang@intel.com>
Cc: "Krzysztof Wilczyński" <kw@linux.com>
Cc: linux-input@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>

drivers/hid/intel-ish-hid/ipc/ipc.c

@@ -544,7 +544,7 @@ static int ish_fw_reset_handler(struct ishtp_device *dev)
 #define TIMEOUT_FOR_HW_RDY_MS			300
 
 /**
- * ish_fw_reset_work_fn() - FW reset worker function
+ * fw_reset_work_fn() - FW reset worker function
  * @unused: not used
  *
  * Call ish_fw_reset_handler to complete FW reset