dt-bindings: pinctrl: qcom: Add X1E80100 pinctrl

Add device tree binding Documentation details for Qualcomm X1E80100 TLMM
device.

Signed-off-by: Rajendra Nayak <quic_rjendra@quicinc.com>
Co-developed-by: Sibi Sankar <quic_sibis@quicinc.com>
Signed-off-by: Sibi Sankar <quic_sibis@quicinc.com>
Reviewed-by: Bjorn Andersson <andersson@kernel.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20231117093921.31968-2-quic_sibis@quicinc.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>