build: use allowed over enabled or not-disabled

Meson feature options are typically in a tri-state of enabled, disabled,
or auto.  The enabled and disabled functions on an option (from
`get_option`) no longer return true for auto features.  Instead, the
expectation is to use `allowed()` which is true for both enabled and
auto.

Switch all uses of `enabled` to `allowed`.
Switch all uses of `not disabled` to `allowed`.

Change-Id: Ia942d083f4ddab68acbbb40699ea1971e09db771
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
diff --git a/bmc/firmware-handler/meson.build b/bmc/firmware-handler/meson.build
index 14624d8..2d935a3 100644
--- a/bmc/firmware-handler/meson.build
+++ b/bmc/firmware-handler/meson.build
@@ -64,17 +64,17 @@
   'lpc_handler.cpp']
 
 if (get_option('lpc-type') == 'aspeed-lpc' or
-    not get_option('tests').disabled())
+    get_option('tests').allowed())
   firmware_source += 'lpc_aspeed.cpp'
 endif
 
 if (get_option('lpc-type') == 'nuvoton-lpc' or
-    not get_option('tests').disabled())
+    get_option('tests').allowed())
   firmware_source += 'lpc_nuvoton.cpp'
 endif
 
 if (get_option('p2a-type') == 'aspeed-p2a' or
-    not get_option('tests').disabled())
+    get_option('tests').allowed())
   firmware_source += 'pci_handler.cpp'
 endif
 
@@ -121,6 +121,6 @@
   install: true,
   install_dir: get_option('libdir') / 'blob-ipmid')
 
-if not get_option('tests').disabled()
+if get_option('tests').allowed()
   subdir('test')
 endif
diff --git a/bmc/log-handler/meson.build b/bmc/log-handler/meson.build
index 50c4bed..5fad0cf 100644
--- a/bmc/log-handler/meson.build
+++ b/bmc/log-handler/meson.build
@@ -30,6 +30,6 @@
   install: true,
   install_dir: get_option('libdir') / 'blob-ipmid')
 
-if not get_option('tests').disabled()
+if get_option('tests').allowed()
   subdir('test')
 endif
\ No newline at end of file
diff --git a/bmc/meson.build b/bmc/meson.build
index 40ca2b3..7a5ebad 100644
--- a/bmc/meson.build
+++ b/bmc/meson.build
@@ -18,7 +18,7 @@
   link_with: common_lib,
   dependencies: common_pre)
 
-if not get_option('tests').disabled()
+if get_option('tests').allowed()
   subdir('test')
 endif
 
diff --git a/bmc/version-handler/meson.build b/bmc/version-handler/meson.build
index f5b4694..6059dd4 100644
--- a/bmc/version-handler/meson.build
+++ b/bmc/version-handler/meson.build
@@ -30,6 +30,6 @@
   install: true,
   install_dir: get_option('libdir') / 'blob-ipmid')
 
-if not get_option('tests').disabled()
+if get_option('tests').allowed()
   subdir('test')
 endif
\ No newline at end of file