ARM: dts: imx7ulp: update the LPI2C clock-names

The clock name should be per clock, not ipg clock.
Reviewed-by: Dong Aisheng <aisheng.dong@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx7ulp.dtsi

@@ -329,7 +329,7 @@ lpi2c6: i2c@40a40000 {
 			reg = <0x40a40000 0x10000>;
 			interrupts = <GIC_SPI 36 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&pcc3 IMX7ULP_CLK_LPI2C6>;
-			clock-names = "ipg";
+			clock-names = "per";
 			assigned-clocks = <&pcc3 IMX7ULP_CLK_LPI2C6>;
 			assigned-clock-parents = <&scg1 IMX7ULP_CLK_FIRC>;
 			assigned-clock-rates = <48000000>;
@@ -341,7 +341,7 @@ lpi2c7: i2c@40a50000 {
 			reg = <0x40a50000 0x10000>;
 			interrupts = <GIC_SPI 37 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&pcc3 IMX7ULP_CLK_LPI2C7>;
-			clock-names = "ipg";
+			clock-names = "per";
 			assigned-clocks = <&pcc3 IMX7ULP_CLK_LPI2C7>;
 			assigned-clock-parents = <&scg1 IMX7ULP_CLK_FIRC>;
 			assigned-clock-rates = <48000000>;