icorem6_rqs: Rename icorem6_rqs config file

imx6qdl_icore_mmc_defconfig => imx6qdl_icore_rqs_defconfig
Since icorem6_rqs support MMC/eMMC boot, so doesn't need
to name it explicitly.

Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>

board/engicam/icorem6_rqs/MAINTAINERS

@@ -3,7 +3,7 @@ M:	Jagan Teki <jagan@amarulasolutions.com>
 S:	Maintained
 F:	board/engicam/icorem6_rqs
 F:	include/configs/imx6qdl_icore_rqs.h
-F:	configs/imx6qdl_icore_rqs_mmc_defconfig
+F:	configs/imx6qdl_icore_rqs_defconfig
 F:	arch/arm/dts/imx6qdl-icore-rqs.dtsi
 F:	arch/arm/dts/imx6q-icore-rqs.dts
 F:	arch/arm/dts/imx6dl-icore-rqs.dts