doc: dt-binding: mxs-usb-phy: fix fsl,tx-cal-45-dn-ohms max and min value

doc: dt-binding: mxs-usb-phy: fix fsl,tx-cal-45-dn-ohms max and min value

According to spec:
	0000 +19.95%
	....
	1111 -21.68%

45 * (1 + 19.95%) = 53.9775
45 * (1 - 21.68%) = 35.244

Chanege fsl,tx-cal-45-dn-ohms and fsl,tx-cal-45-dp-ohms range to [35-54]
from [30-55]

Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Frank Li <Frank.Li@nxp.com>
Link: https://lore.kernel.org/r/20220829153124.2791210-1-Frank.Li@nxp.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>