main/postmarketos-initramfs: add missing USB gadget modules

init_functions.sh makes use of the mass_storage and acm USB gadget functions for error reporting, but the necessary kernel modules are not included in the initramfs at the moment. Because of this, the functionality works only on kernels where all these USB gadget functions are built-in and not built as modules.

Add the missing modules and fix the sort order while at it.

main/postmarketos-initramfs/00-default.modules

@@ -17,8 +17,10 @@ nls_cp437
 nls_iso8859_1
 nls_utf8
 uinput
-usb_f_rndis
+usb_f_acm
 usb_f_ncm
+usb_f_mass_storage
+usb_f_rndis
 usb-storage
 vfat
 xts