oem-ibm: change default

Generally we have not enabled OEM-specific code as a default
meson-option but instead enable with a bitbake recipe.  Removing
enable-by-default setting on oem-ibm.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I5f74e26aa4ea655b7f2ddb2d5098b0b42b28a214
diff --git a/meson_options.txt b/meson_options.txt
index 32e4ac3..9a87a46 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -1,6 +1,6 @@
 option('tests', type: 'feature', description: 'Build tests', value: 'enabled')
 option('oe-sdk', type: 'feature', description: 'Enable OE SDK')
-option('oem-ibm', type: 'feature', description: 'Enable IBM OEM PLDM', value: 'enabled')
+option('oem-ibm', type: 'feature', description: 'Enable IBM OEM PLDM')
 option('requester-api', type: 'feature', description: 'Enable libpldm requester API', value: 'enabled')
 option('utilities', type: 'feature', description: 'Enable debug utilities', value: 'enabled')