ARM: dts: imx7d-smegw01: Pass 'gpr' to the pinctrl groups

Pass 'gpr' to the pinctrl groups to fix the following
'make CHECK_DTBS=y imx7d-smegw01.dtb' warning:

pinctrl@30330000: 'rfkillrp', 'usbotg1', 'usbotg1-pwr', 'usbotg1-pwr-gpio' do not match any of the regexes: 'grp$', 'pinctrl-[0-9]+'
From schema: Documentation/devicetree/bindings/pinctrl/fsl,imx7d-pinctrl.yaml
Signed-off-by: Fabio Estevam <festevam@denx.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx7d-smegw01.dts

@@ -327,7 +327,7 @@ MX7D_PAD_SAI2_RX_DATA__GPIO6_IO21	0x17059
 		>;
 	};
 
-	pinctrl_rfkill: rfkillrp {
+	pinctrl_rfkill: rfkillgrp {
 		fsl,pins = <
 			MX7D_PAD_EPDC_DATA11__GPIO2_IO11	0x17059
 		>;
@@ -353,19 +353,19 @@ MX7D_PAD_UART3_RX_DATA__UART3_DCE_RX	0x74
 		>;
 	};
 
-	pinctrl_usbotg1_lpsr: usbotg1 {
+	pinctrl_usbotg1_lpsr: usbotg1grp {
 		fsl,pins = <
 			MX7D_PAD_LPSR_GPIO1_IO04__USB_OTG1_OC	0x04
 		>;
 	};
 
-	pinctrl_usbotg1_pwr: usbotg1-pwr {
+	pinctrl_usbotg1_pwr: usbotg1-pwrgrp {
 		fsl,pins = <
 			MX7D_PAD_LPSR_GPIO1_IO05__USB_OTG1_PWR	0x04
 		>;
 	};
 
-	pinctrl_usbotg1_pwr_gpio: usbotg1-pwr-gpio {
+	pinctrl_usbotg1_pwr_gpio: usbotg1-pwr-gpiogrp {
 		fsl,pins = <
 			MX7D_PAD_LPSR_GPIO1_IO05__GPIO1_IO5	0x04
 		>;