automation: align XTF qemu parameters across achitectures

It is handy to have 2 CPUs and more RAM for smoke testing a hypervisor
change via XTF.

Align x86 QEMU configuration with Arm for XTF tests: 2 CPU and 2G of RAM.

Signed-off-by: Denis Mukhin <dmukhin@ford.com>
Acked-by: Stefano Stabellini <sstabellini@kernel.org>

automation/scripts/include/xtf-x86-64

@@ -23,7 +23,8 @@ function xtf_arch_setup()
         -nographic \
         -monitor none \
         -serial stdio \
-        -m 512 \
+        -m 2048 \
+        -smp 2 \
         -kernel ${XEN_BINARY} \
         -initrd ${XTF_BINARY} \
         -append \"${XEN_CMDLINE}\" \

automation/scripts/include/xtf-x86-64-efi

@@ -49,7 +49,8 @@ EOF
         -nographic \
         -monitor none \
         -serial stdio \
-        -m 512 \
+        -m 2048 \
+        -smp 2 \
         -M q35,kernel-irqchip=split \
         -drive if=pflash,format=raw,readonly=on,file=${FW_PREFIX}OVMF_CODE${suff}.fd \
         -drive if=pflash,format=raw,file=${WORKDIR}/OVMF_VARS${suff}.fd \