Merge remote-tracking branch 'bpodrygajlo/xran-arm-build-fix' into integration_2026_w28

Simplifications for xran builds (#273)

- make xran_DOWNLOAD=ON default - skips an extra argument in cmake
  command
- Automatically detect aarch64 and select correct target for external
  xran build

Reviewed-by: Jaroslava Fiedlerova <jaroslava.fiedlerova@openairinterface.org>
Reviewed-by: Teodora Vladić <teodora.vladic@openairinterface.org>

docker/Dockerfile.build.fhi72.native_arm.ubuntu

@@ -9,7 +9,7 @@
 
 FROM ran-base:latest AS ran-base
 
-ARG xran_VERSION=11.1.2
+ARG xran_VERSION=11.1.3
 ARG E2AP_VERSION=E2AP_V3
 ARG KPM_VERSION=KPM_V3_00
 ENV DEBIAN_FRONTEND=noninteractive
@@ -41,7 +41,7 @@ RUN git clone https://github.com/openairinterface/o-du-phy.git /opt/phy && \
     cd /opt/phy && \
     git checkout $xran_VERSION &&\
     cd /opt/phy/fhi_lib/lib && \
-    TARGET=armv8 WIRELESS_SDK_TOOLCHAIN=gcc RTE_SDK=/oai-ran/dpdk-stable-24.11.4/ XRAN_DIR=/opt/phy/fhi_lib make XRAN_LIB_SO=1
+    WIRELESS_SDK_TOOLCHAIN=gcc RTE_SDK=/oai-ran/dpdk-stable-24.11.4/ XRAN_DIR=/opt/phy/fhi_lib make XRAN_LIB_SO=1
 
 ## Build Arm RAN Acceleration Library
 RUN git clone https://git.gitlab.arm.com/networking/ral.git /opt/ral && \

docker/Dockerfile.build.fhi72.rhel9

@@ -13,7 +13,7 @@ ENV TZ=Europe
 RUN rm -Rf /oai-ran
 WORKDIR /oai-ran
 
-ARG xran_VERSION=11.1.2
+ARG xran_VERSION=11.1.3
 
 ## Download and build DPDK
 RUN wget --no-verbose http://fast.dpdk.org/rel/dpdk-24.11.4.tar.xz && \

docker/Dockerfile.build.fhi72.t2.ubuntu

@@ -9,7 +9,7 @@
 
 FROM ran-base:latest AS ran-base
 
-ARG xran_VERSION=11.1.2
+ARG xran_VERSION=11.1.3
 ARG DPDK_VERSION=22.11
 ARG T2_PATCH=AMD-T2-SDFEC_25-03-1.patch
 ENV DEBIAN_FRONTEND=noninteractive

docker/Dockerfile.build.fhi72.ubuntu

@@ -9,7 +9,7 @@
 
 FROM ran-base:latest AS ran-base
 
-ARG xran_VERSION=11.1.2
+ARG xran_VERSION=11.1.3
 ARG E2AP_VERSION=E2AP_V3
 ARG KPM_VERSION=KPM_V3_00
 ENV DEBIAN_FRONTEND=noninteractive