.gitlab-ci.yml: Update imx6-sabresd defconfig entries

After the conversion to SPL the imx6sabresd defconfig targets have
been renamed, so update their entries accordingly.

Suggested-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

.gitlab-ci.yml

@@ -120,8 +120,8 @@ gdb_bfin_bf512_defconfig: *defconfig
 grinn_chiliboard_defconfig: *defconfig
 grinn_liteboard_defconfig: *defconfig
 imx23evk_defconfig: *defconfig
-imx6q-sabresd_defconfig: *defconfig
-imx6q-sabresd_qt5_defconfig: *defconfig
+imx6-sabresd_defconfig: *defconfig
+imx6-sabresd_qt5_defconfig: *defconfig
 imx6ulpico_defconfig: *defconfig
 imx7dpico_defconfig: *defconfig
 lego_ev3_defconfig: *defconfig