meson: add option for open-power functions

This repository has long had an open-power only function that ends
up compiled into all systems.  We cannot use the phosphor-logging
generated errors, unless we are able to disable this code on
non-open-power systems.  Add necessary meson options.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: Icd5b2f4cdec206597029930790ef2b10170d232a
diff --git a/meson.options b/meson.options
index 2513c56..2553d89 100644
--- a/meson.options
+++ b/meson.options
@@ -78,4 +78,7 @@
 option('matches-map', type : 'array', value : ['1', '2', '0', '0', '0', '0'], description : 'An array of integers')
 
 # libipmi20.so library
-option('dynamic-storages-only', type: 'feature', value: 'disabled', description: 'Request to compile storage commands in the libipmi20 library')
\ No newline at end of file
+option('dynamic-storages-only', type: 'feature', value: 'disabled', description: 'Request to compile storage commands in the libipmi20 library')
+
+# open-power specific functionality.
+option('open-power', type: 'feature', description: 'Support open-power specific functions')