meson.build: Declare global edk2_targets / install_edk2_blobs variables

Globally declare in the main meson.build:
- the list of EDK2 targets,
- whether the EDK2 blobs have to be installed.

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20210114174509.2944817-2-philmd@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

meson.build

@@ -88,6 +88,14 @@ if cpu in ['x86', 'x86_64']
   }
 endif
 
+edk2_targets = [ 'arm-softmmu', 'aarch64-softmmu', 'i386-softmmu', 'x86_64-softmmu' ]
+install_edk2_blobs = false
+if get_option('install_blobs')
+  foreach target : target_dirs
+    install_edk2_blobs = install_edk2_blobs or target in edk2_targets
+  endforeach
+endif
+
 ##################
 # Compiler flags #
 ##################

pc-bios/descriptors/meson.build

@@ -1,3 +1,4 @@
+if install_edk2_blobs
   foreach f: [
     '50-edk2-i386-secure.json',
     '50-edk2-x86_64-secure.json',
@@ -12,3 +13,4 @@ foreach f: [
                    install: get_option('install_blobs'),
                    install_dir: qemu_datadir / 'firmware')
   endforeach
+endif

pc-bios/meson.build

@@ -1,7 +1,4 @@
-if 'arm-softmmu' in target_dirs or \
+if install_edk2_blobs
-    'aarch64-softmmu' in target_dirs or \
-    'i386-softmmu' in target_dirs or \
-    'x86_64-softmmu' in target_dirs
   bzip2 = find_program('bzip2', required: true)
   fds = [
     'edk2-aarch64-code.fd',