arm64: dts: qcom: sdm630: correct I2C8 pin functions

The I2C8 pins are split into i2c8_a (GPIO30 and GPIO31) and i2c8_b
(GPIO44 and GPIO52).  Correct the name of function for I2C8 pins.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@somainline.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20221011190231.76784-2-krzysztof.kozlowski@linaro.org

arch/arm64/boot/dts/qcom/sdm630.dtsi

@@ -885,14 +885,14 @@ i2c7_sleep: i2c7-sleep {
 
 			i2c8_default: i2c8-default {
 				pins = "gpio30", "gpio31";
-				function = "blsp_i2c8";
+				function = "blsp_i2c8_a";
 				drive-strength = <2>;
 				bias-disable;
 			};
 
 			i2c8_sleep: i2c8-sleep {
 				pins = "gpio30", "gpio31";
-				function = "blsp_i2c8";
+				function = "blsp_i2c8_a";
 				drive-strength = <2>;
 				bias-pull-up;
 			};