arm64: dts: imx8mq-librem5-devkit: Align pin configuration group names with schema

Device tree schema expects pin configuration groups to end with 'grp'
suffix, otherwise dtbs_check complain with a warning like:

    ... do not match any of the regexes: 'grp$', 'pinctrl-[0-9]+'
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm64/boot/dts/freescale/imx8mq-librem5-devkit.dts

@@ -735,7 +735,7 @@ MX8MQ_IOMUXC_SD1_RESET_B_USDHC1_RESET_B		0xc1
 		>;
 	};
 
-	pinctrl_usdhc1_100mhz: usdhc1grp100mhz {
+	pinctrl_usdhc1_100mhz: usdhc1-100mhzgrp {
 		fsl,pins = <
 			MX8MQ_IOMUXC_SD1_CLK_USDHC1_CLK			0x8d
 			MX8MQ_IOMUXC_SD1_CMD_USDHC1_CMD			0xcd
@@ -752,7 +752,7 @@ MX8MQ_IOMUXC_SD1_RESET_B_USDHC1_RESET_B		0xc1
 		>;
 	};
 
-	pinctrl_usdhc1_200mhz: usdhc1grp200mhz {
+	pinctrl_usdhc1_200mhz: usdhc1-200mhzgrp {
 		fsl,pins = <
 			MX8MQ_IOMUXC_SD1_CLK_USDHC1_CLK			0x9f
 			MX8MQ_IOMUXC_SD1_CMD_USDHC1_CMD			0xdf
@@ -769,13 +769,13 @@ MX8MQ_IOMUXC_SD1_RESET_B_USDHC1_RESET_B		0xc1
 		>;
 	};
 
-	pinctrl_usdhc2_pwr: usdhc2grppwr {
+	pinctrl_usdhc2_pwr: usdhc2pwrgrp {
 		fsl,pins = <
 			MX8MQ_IOMUXC_SD2_RESET_B_GPIO2_IO19	0x41
 		>;
 	};
 
-	pinctrl_usdhc2_gpio: usdhc2grpgpio {
+	pinctrl_usdhc2_gpio: usdhc2gpiogrp {
 		fsl,pins = <
 			MX8MQ_IOMUXC_SD2_WP_GPIO2_IO20		0x80 /* WIFI_WAKE */
 		>;
@@ -792,7 +792,7 @@ MX8MQ_IOMUXC_SD2_DATA3_USDHC2_DATA3	0xc3
 		>;
 	};
 
-	pinctrl_usdhc2_100mhz: usdhc2grp100mhz {
+	pinctrl_usdhc2_100mhz: usdhc2-100mhzgrp {
 		fsl,pins = <
 			MX8MQ_IOMUXC_SD2_CLK_USDHC2_CLK		0x8d
 			MX8MQ_IOMUXC_SD2_CMD_USDHC2_CMD		0xcd
@@ -803,7 +803,7 @@ MX8MQ_IOMUXC_SD2_DATA3_USDHC2_DATA3	0xcd
 		>;
 	};
 
-	pinctrl_usdhc2_200mhz: usdhc2grp200mhz {
+	pinctrl_usdhc2_200mhz: usdhc2-200mhzgrp {
 		fsl,pins = <
 			MX8MQ_IOMUXC_SD2_CLK_USDHC2_CLK		0x9f
 			MX8MQ_IOMUXC_SD2_CMD_USDHC2_CMD		0xcf