common: move common repositories to separate file

Move OP-TEE, linaro-swg and buildroot repositories to
separate common.xml, so it can be included by other manifests.

Reviewed-by: Joakim Bech <joakim.bech@linaro.org>
Acked-by: Etienne Carriere <etienne.carriere@foss.st.com>
Reviewed-by: Jens Wiklander <jens.wiklander@linaro.org>
Signed-off-by: Igor Opaniuk <igor.opaniuk@foundries.io>
diff --git a/am43xx.xml b/am43xx.xml
index aca2597..e223793 100644
--- a/am43xx.xml
+++ b/am43xx.xml
@@ -1,23 +1,13 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <manifest>
-        <remote name="github" fetch="https://github.com" />
         <remote name="ti" fetch="git://git.ti.com" />
 
-        <default remote="github" revision="master" />
-
-        <!-- OP-TEE gits -->
-        <project path="optee_client"   name="OP-TEE/optee_client.git" />
-        <project path="optee_os"       name="OP-TEE/optee_os.git" />
-        <project path="optee_test"     name="OP-TEE/optee_test.git" />
+        <include name="common.xml" />
         <project path="build"          name="OP-TEE/build.git">
                 <linkfile src="am43xx.mk" dest="build/Makefile" />
         </project>
+        <remove-project                name="linaro-swg/linux.git" />
 
-        <!-- linaro-swg gits -->
-        <project path="optee_examples" name="linaro-swg/optee_examples.git" />
-
-        <!-- Misc gits -->
-        <project path="buildroot"      name="buildroot/buildroot.git"             revision="refs/tags/2022.11.1" clone-depth="1" />
         <project path="linux"          name="ti-linux-kernel/ti-linux-kernel.git" revision="00a3beacce33dc14fa301eb5f3fb5a341212e9b4" remote="ti" />
         <project path="u-boot"         name="ti-u-boot/ti-u-boot.git"             revision="c68ed086bd00054e28c46e033385f79104c3f84c" remote="ti" />
 </manifest>