petalinux-features.conf: Add ext4 format in IMAGE_FSTYPES
petalinux-features.conf: Add ext4 format in IMAGE_FSTYPES

Default distro images doesn't generate .ext4 file system format.
Vitis Platform needs .ext4 format when we create application.

Signed-off-by: Sandeep Gundlupet Raju <eaeca0ea0d778dfb64d22c43189d46f965ce7ff5@xilinx.com>
Signed-off-by: Sai Hari Chandana Kalluri <dcd6f85a7bffd89d026445db0f5113d6d436d06a@xilinx.com>

Xilinx/meta-petalinux,Xilinx/meta-petalinux,Xilinx/meta-petalinux,Xilinx/meta-petalinux,Xilinx/meta-petalinux,Xilinx/meta-petalinux