rt_cpu: load rt_cpu.elf file and change PLL config according to scb_ver

The script to load the elf file at startup need to be improved but it
was a quick hack to have things works on SCB v3.3 and SCB v3.4.

build/scripts/wrs_build_gateware

@@ -13,7 +13,7 @@ FWDIR="${WRS_OUTPUT_DIR}/images/wr/lib/firmware"
 mkdir -p "$FWDIR"
 
 echo "Using pre-compiled (binaries/) RT firmware"
-cp ${WRS_BASE_DIR}/../binaries/rt_cpu.bin "$FWDIR"
+cp ${WRS_BASE_DIR}/../binaries/rt_cpu.elf "$FWDIR"
 
 if [ "$WRS_HW_DIR" != "" ]; then
     wrs_echo "Copying binaries from $WRS_HW_DIR"

userspace/rootfs_override/wr/sbin/startup-mb.sh

@@ -12,8 +12,14 @@ done
 # Obtain the type of FPGA (LX130XT or LX240XT)
 tfpga=$($WR_HOME/bin/wrs_version -F)
 
+# TODO: Update wrsw_version to read this value from DF.
+scb_ver=33
+if mtdinfo -a | grep -A 1 dataflash | grep 264 &> /dev/null; then
+	scb_ver=34
+fi
+
 $WR_HOME/bin/load-virtex $WR_HOME/lib/firmware/18p_mb-${tfpga}.bin
-$WR_HOME/bin/load-lm32 $WR_HOME/lib/firmware/rt_cpu.bin
+$WR_HOME/bin/load-lm32 $WR_HOME/lib/firmware/rt_cpu.elf scb_ver=${scb_ver}
 insmod $WR_HOME/lib/modules/at91_softpwm.ko
 insmod $WR_HOME/lib/modules/wr_vic.ko
 insmod $WR_HOME/lib/modules/wr-nic.ko macaddr=$val