ARM: dts: imx6ul: mba6ulx: fix typo in comments

Replace 'SPPEED' with 'SPEED'
Signed-off-by: Markus Niebel <Markus.Niebel@ew.tq-group.com>
Signed-off-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/nxp/imx/mba6ulx.dtsi

@@ -467,7 +467,7 @@ MX6UL_PAD_UART2_CTS_B__FLEXCAN2_TX	0x1b020
 
 	pinctrl_pwm2: pwm2grp {
 		fsl,pins = <
-			/* 100 k PD, DSE 120 OHM, SPPEED LO */
+			/* 100 k PD, DSE 120 OHM, SPEED LO */
 			MX6UL_PAD_GPIO1_IO09__PWM2_OUT		0x00003050
 		>;
 	};