bios-tables-test: use 128M numa nodes on aarch64

Recent edk2 versions don't boot with very small numa nodes.
Bump the size from 64M to 128M.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

tests/qtest/bios-tables-test.c

@@ -1679,9 +1679,9 @@ static void test_acpi_virt_tcg_acpi_hmat(void)
     test_acpi_one(" -machine hmat=on"
                   " -cpu cortex-a57"
                   " -smp 4,sockets=2"
-                  " -m 256M"
-                  " -object memory-backend-ram,size=64M,id=ram0"
-                  " -object memory-backend-ram,size=64M,id=ram1"
+                  " -m 384M"
+                  " -object memory-backend-ram,size=128M,id=ram0"
+                  " -object memory-backend-ram,size=128M,id=ram1"
                   " -object memory-backend-ram,size=128M,id=ram2"
                   " -numa node,nodeid=0,memdev=ram0"
                   " -numa node,nodeid=1,memdev=ram1"