HID: Intel-thc-hid: Intel-thc: Fix wrong register reading

HID: Intel-thc-hid: Intel-thc: Fix wrong register reading

[ Upstream commit f39006965dd37e7be823dba6ca484adccc7a4dff ]

Correct the read register for the setting of max input size and
interrupt delay.

Fixes: 22da60f0304b ("HID: Intel-thc-hid: Intel-thc: Introduce interrupt delay control")
Fixes: 45e92a093099 ("HID: Intel-thc-hid: Intel-thc: Introduce max input size control")
Signed-off-by: Even Xu <even.xu@intel.com>
Signed-off-by: Benjamin Tissoires <bentiss@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>