put linux.preset config back in mkinitcpio.conf.d folder to omit getting issue on upstream chganges as it would use default config from system path

Author: killajoe

airootfs/etc/mkinitcpio.conf.d/linux.preset

@@ -0,0 +1,8 @@
+# mkinitcpio preset file for the 'linux' package on archiso
+
+PRESETS=('archiso')
+
+ALL_kver='/boot/vmlinuz-linux'
+archiso_config='/etc/mkinitcpio.conf.d/archiso.conf'
+
+archiso_image="/boot/initramfs-linux.img"