ARM: dts: imx6ul-kontron-n6x1x-s: Remove an obsolete comment and fix indentation

The ECSPI1 is not used for a FRAM chip, so remove the comment.
While at it, also change some whitespaces to tabs to comply with the
indentation style of the rest of the file.

Signed-off-by: Frieder Schrempf <frieder.schrempf@kontron.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx6ul-kontron-n6x1x-s.dtsi

@@ -250,7 +250,6 @@
 		>;
 	};
 
-	/* FRAM */
 	pinctrl_ecspi1: ecspi1grp {
 		fsl,pins = <
 			MX6UL_PAD_CSI_DATA07__ECSPI1_MISO	0x100b1