firmware-imx: update package description

Current firmware-imx version no longer contains ath6k and ar3k firmware.

Cc: Gary Bisson <gary.bisson@boundarydevices.com>
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Acked-by: Gary Bisson <gary.bisson@boundarydevices.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/freescale-imx/firmware-imx/Config.in

@@ -4,10 +4,7 @@ config BR2_PACKAGE_FIRMWARE_IMX
 	help
 	  Firmware blobs for the Freescale i.MX SoCs.
 
-	  It contains blobs for Atheros AR6003, SDMA and VPU.
-
-	  Note: it also contains a blob for ar3k/30101 but upstream
-	  linux-firmware has that as well.
+	  It contains blobs for SDMA and VPU.
 
 	  This library is provided by Freescale as-is and doesn't have
 	  an upstream.