libcamera: Correctly report enabled ipa modules

"ipa_modules" stores the value of the ipas meson build option. IPAs are
enabled if and only if there is an enabled pipeline for an IPA listed in
"ipa_modules" array. It is basically the intersection of pipelines and
ipa_modules array.

In order to correctly report which IPAs get enabled, let's create a new
array storing this intersection.

Cc: Quentin Schulz <foss+libcamera@0leil.net>
Reported-by: Daniel Semkowicz <dse@thaumatec.com>
Signed-off-by: Quentin Schulz <quentin.schulz@theobroma-systems.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>

src/ipa/meson.build

@@ -27,6 +27,7 @@ ipa_sign = files('ipa-sign.sh')
 ipa_names = []
 
 ipa_modules = get_option('ipas')
+enabled_ipa_modules = []
 
 # The ipa-sign-install.sh script which uses the ipa_names variable will itself
 # prepend MESON_INSTALL_DESTDIR_PREFIX to each ipa module name, therefore we
@@ -35,6 +36,7 @@ foreach pipeline : pipelines
     if ipa_modules.contains(pipeline)
         subdir(pipeline)
         ipa_names += ipa_install_dir / ipa_name + '.so'
+        enabled_ipa_modules += pipeline
     endif
 endforeach