ARM: dts: imx6qdl-sabrelite: remove erratum ERR006687 workaround

There is a pin conflict with GPIO_6. This pin functions as a power
input pin to the OV5642 camera sensor, but ENET uses it as the h/w
workaround for erratum ERR006687, to wake-up the ARM cores on normal
RX and TX packet done events. So we need to remove the h/w workaround
to support the OV5642. The result is that the CPUidle driver will no
longer allow entering the deep idle states on the sabrelite.

This is a partial revert of

commit 6261c4c8 ("ARM: dts: imx6qdl-sabrelite: use GPIO_6 for FEC
			interrupt.")
commit a28eeb43 ("ARM: dts: imx6: tag boards that have the HW workaround
			for ERR006687")
Signed-off-by: Steve Longerbeam <steve_longerbeam@mentor.com>
Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx6qdl-sabrelite.dtsi

@@ -270,9 +270,6 @@ &fec {
 	txd1-skew-ps = <0>;
 	txd2-skew-ps = <0>;
 	txd3-skew-ps = <0>;
-	interrupts-extended = <&gpio1 6 IRQ_TYPE_LEVEL_HIGH>,
-			      <&intc 0 119 IRQ_TYPE_LEVEL_HIGH>;
-	fsl,err006687-workaround-present;
 	status = "okay";
 };
 
@@ -373,7 +370,6 @@ MX6QDL_PAD_RGMII_RD3__RGMII_RD3		0x1b030
 				MX6QDL_PAD_RGMII_RX_CTL__RGMII_RX_CTL	0x1b030
 				/* Phy reset */
 				MX6QDL_PAD_EIM_D23__GPIO3_IO23		0x000b0
-				MX6QDL_PAD_GPIO_6__ENET_IRQ		0x000b1
 			>;
 		};