machine: mps2/mps3: add missing QEMU and Zephyr board settings

Update MPS2 and MPS3 machine configurations:

- Add ZEPHYR_BOARD with the current Zephyr board identifiers
  (mps2/an385, mps2/an521/cpu0, mps3/corstone300/an547).
- Add QB_RNG = "" to disable virtio-rng, which is unsupported on
  these machines.
- Add QB_MEM to explicitly set memory (16 MB for mps2-an385,
  2048 MB for mps3-an547; mps2-an521 already had it).

Signed-off-by: Charles Dias <charlesdias.cd@outlook.com>
Signed-off-by: Lee Chee Yang <chee.yang.lee@intel.com>

meta-zephyr-bsp/conf/machine/mps2-an385.conf

@@ -11,8 +11,11 @@ TCLIBC = "newlib"
 QB_SYSTEM_NAME = "qemu-system-arm"
 QB_MACHINE = "-machine mps2-an385"
 QB_CPU = "-cpu cortex-m3"
+QB_MEM = "-m 16"
 QB_GRAPHICS = "-vga none"
 QB_OPT_APPEND = "-icount shift=7,align=off,sleep=off -rtc clock=vm"
+QB_RNG = ""
 
 # Zephyr RTOS settings
+ZEPHYR_BOARD = "mps2/an385"
 ZEPHYR_INHERIT_CLASSES += "zephyr-qemuboot"

meta-zephyr-bsp/conf/machine/mps2-an521.conf

@@ -15,6 +15,8 @@ QB_CPU = "-cpu cortex-m33"
 QB_MEM = "-m 16"
 QB_GRAPHICS = "-vga none"
 QB_OPT_APPEND = "-icount shift=7,align=off,sleep=off -rtc clock=vm"
+QB_RNG = ""
 
 # Zephyr RTOS settings
+ZEPHYR_BOARD = "mps2/an521/cpu0"
 ZEPHYR_INHERIT_CLASSES += "zephyr-qemuboot"

meta-zephyr-bsp/conf/machine/mps3-an547.conf

@@ -12,8 +12,11 @@ TCLIBC = "newlib"
 QB_SYSTEM_NAME = "qemu-system-arm"
 QB_MACHINE = "-machine mps3-an547"
 QB_CPU = "-cpu cortex-m55"
+QB_MEM = "-m 2048"
 QB_GRAPHICS = "-vga none"
 QB_OPT_APPEND = "-icount shift=7,align=off,sleep=off -rtc clock=vm"
+QB_RNG = ""
 
 # Zephyr RTOS settings
+ZEPHYR_BOARD = "mps3/corstone300/an547"
 ZEPHYR_INHERIT_CLASSES += "zephyr-qemuboot"