gitmodules: Restore but rename upstream .gitmodules

Rename .gitmodules to .gitmodules.unused since our tools/servers don't
support .gitmodules from external projects. Also restore the entries we
removed before. Hopefully this will produce fewer merge conflicts while
still allowing us to replace the needed submodlues with symlinks to
other projects in our manifest.

Bug: 230374325
Change-Id: I833c0c4ad407471ea331ca0b21b6a6f9a5d4535d
diff --git a/.gitmodules b/.gitmodules.unused
similarity index 84%
rename from .gitmodules
rename to .gitmodules.unused
index 7bc0c50..6b91176 100644
--- a/.gitmodules
+++ b/.gitmodules.unused
@@ -19,6 +19,9 @@
 [submodule "roms/sgabios"]
 	path = roms/sgabios
 	url = https://git.qemu.org/git/sgabios.git
+[submodule "dtc"]
+	path = dtc
+	url = https://git.qemu.org/git/dtc.git
 [submodule "roms/u-boot"]
 	path = roms/u-boot
 	url = https://git.qemu.org/git/u-boot.git
@@ -28,6 +31,12 @@
 [submodule "roms/QemuMacDrivers"]
 	path = roms/QemuMacDrivers
 	url = https://git.qemu.org/git/QemuMacDrivers.git
+[submodule "ui/keycodemapdb"]
+	path = ui/keycodemapdb
+	url = https://git.qemu.org/git/keycodemapdb.git
+[submodule "capstone"]
+	path = capstone
+	url = https://git.qemu.org/git/capstone.git
 [submodule "roms/seabios-hppa"]
 	path = roms/seabios-hppa
 	url = https://github.com/hdeller/seabios-hppa.git