Allow installation of multiple hardwares in same build_oai invocation

There is no reason to not allow

    ./build_oai -I -w USRP -w BLADERF

To install USRP and BladeRF together (which will be used in the CI in a
later commit). Fix this.

cmake_targets/build_oai

@@ -36,7 +36,7 @@ set_openair_env
 # Variables for UE data generation
 conf_nvram_path=$OPENAIR_DIR/openair3/NAS/TOOLS/ue_eurecom_test_sfr.conf
 
-HW=""
+HWs=""
 BUILD_DIR=ran_build
 CMAKE_BUILD_TYPE="RelWithDebInfo"
 CMAKE_CMD="$CMAKE"
@@ -253,22 +253,22 @@ function main() {
        -w | --hardware)
             case "$2" in
                 "USRP" | "BLADERF" | "LMSSDR" | "IRIS")
-                    HW="OAI_"$2
+                    HWs+=" OAI_"$2
                     TARGET_LIST="$TARGET_LIST oai_${2,,}devif" # ,, makes lowercase
                     CMAKE_CMD="$CMAKE_CMD -DOAI_$2=ON"
                     ;;
                 "SIMU")
-                    HW="OAI_"$2
+                    HWs+=" OAI_"$2
                     TARGET_LIST="$TARGET_LIST rfsimulator"
                     CMAKE_CMD="$CMAKE_CMD -DOAI_$2=ON"
                     ;;
                 "AW2SORI")
-                    HW="OAI_"$2
+                    HWs=" OAI_"$2
                     TARGET_LIST="$TARGET_LIST aw2sori_transpro"
                     CMAKE_CMD="$CMAKE_CMD -DOAI_$2=ON"
                     ;;
                 "AERIAL"|"Aerial"|"aerial")
-                    HW="OAI_AERIAL"
+                    HWs+=" OAI_AERIAL"
                     CMAKE_CMD="$CMAKE_CMD -DOAI_AERIAL=ON"
                     ;;
                 "None")
@@ -419,21 +419,23 @@ function main() {
       echo_info "installing LTTng"
       install_lttng $1
     fi
-    if [ "$HW" == "OAI_USRP" ] ; then
-      echo_info "installing packages for USRP support"
-      check_install_usrp_uhd_driver
-      if [ ! -v BUILD_UHD_FROM_SOURCE ]; then
-        install_usrp_uhd_driver $UHD_IMAGES_DIR
+    for HW in $HWs; do
+      if [ "$HW" == "OAI_USRP" ] ; then
+        echo_info "installing packages for USRP support"
+        check_install_usrp_uhd_driver
+        if [ ! -v BUILD_UHD_FROM_SOURCE ]; then
+          install_usrp_uhd_driver $UHD_IMAGES_DIR
+        fi
+      elif [ "$HW" == "OAI_BLADERF" ] ; then
+        echo_info "installing packages for BLADERF support"
+        check_install_bladerf_driver
+      elif [ "$HW" == "OAI_IRIS" ] ; then
+        echo_info "installing packages for IRIS support"
+        check_install_soapy
+      else
+        echo_warning "no installation scripts for hardware $HW"
       fi
-    fi
-    if [ "$HW" == "OAI_BLADERF" ] ; then
-      echo_info "installing packages for BLADERF support"
-      check_install_bladerf_driver
-    fi
-    if [ "$HW" == "OAI_IRIS" ] ; then
-      echo_info "installing packages for IRIS support"
-      check_install_soapy
-    fi
+    done
   fi
 
   if [ "$INSTALL_OPTIONAL" = "1" ] ; then