Add new Qemu ARM virtual platform to Kconfig

Qemu ARM virtual platform emulates an ARM machine
with configurable, ARM components. This commit adds
configuration option for Cortex-A7 based virtual machine.

qemu_arm_virt_ca7 name is derived from a command
to invoke Qemu:
qemu-system-arm -M virt -cpu cortex-a7
Signed-off-by: NZbigniew Bodek <zbigniew.bodek@huawei.com>
Change-Id: Ia267ee7c989b8c22e6c19d6f11ff3ee2eef8148b

platform/Kconfig

@@ -2,6 +2,7 @@ config PLATFORM
     string
     default "hi3516dv300"     if PLATFORM_HI3516DV300
     default "hi3518ev300"     if PLATFORM_HI3518EV300
+    default "virt"            if PLATFORM_QEMU_ARM_VIRT_CA7
 
 choice
     prompt "Board"
@@ -10,6 +11,8 @@ choice
       IPC has several chips:
       hi3516dv300
       hi3518ev300
+      Qemu ARM Virt variants (based on different CPU types):
+      qemu_arm_virt_ca7
 
 config PLATFORM_HI3516DV300
     bool "hi3516dv300"
@@ -19,6 +22,12 @@ config PLATFORM_HI3518EV300
     bool "hi3518ev300"
     select ARCH_CORTEX_A7
 
+config PLATFORM_QEMU_ARM_VIRT_CA7
+    bool "qemu_arm_virt_ca7"
+    select ARCH_CORTEX_A7
+    help
+        QEMU ARM Virtual Platform using Cortex-A7 CPU.
+
 endchoice
 
 config TEE_ENABLE