configs/versal_vck190_defconfig: migrate to xilinx-prebuilt

Migrate versal_vck190_defconfig to xilinx-prebuilt.

Signed-off-by: Neal Frager <neal.frager@amd.com>
Reviewed-by: Brandon Maier <brandon.maier@collins.com>
[yann.morin.1998@free.fr: drop default from defconfig]
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

configs/versal_vck190_defconfig

@@ -32,9 +32,9 @@ BR2_TARGET_UBOOT_NEEDS_OPENSSL=y
 BR2_TARGET_UBOOT_NEEDS_GNUTLS=y
 BR2_TARGET_UBOOT_FORMAT_REMAKE_ELF=y
 BR2_TARGET_UBOOT_FORMAT_DTB=y
-BR2_PACKAGE_VERSAL_FIRMWARE=y
-BR2_PACKAGE_VERSAL_FIRMWARE_VERSION="xilinx_v2024.1"
-BR2_PACKAGE_VERSAL_FIRMWARE_BOARD="vck190"
+BR2_TARGET_XILINX_PREBUILT=y
+BR2_TARGET_XILINX_PREBUILT_VERSION="xilinx_v2024.1"
+BR2_TARGET_XILINX_PREBUILT_VERSAL=y
 BR2_PACKAGE_HOST_DOSFSTOOLS=y
 BR2_PACKAGE_HOST_GENIMAGE=y
 BR2_PACKAGE_HOST_MTOOLS=y