smbios-mdr: Adding PACKAGECONFIG assoc-trim-path

Adding a PACKAGECONFIG line for this new option, to pass it through
correctly, from the Bitbake recipe to the Meson option when compiling.

Change-Id: I67f322a2ec27130b79441f57add5e08ebc4e0817
Signed-off-by: Josh Lehan <krellan@google.com>
diff --git a/meta-phosphor/recipes-phosphor/smbios/smbios-mdr_git.bb b/meta-phosphor/recipes-phosphor/smbios/smbios-mdr_git.bb
index 231a4d9..f6cea89 100644
--- a/meta-phosphor/recipes-phosphor/smbios/smbios-mdr_git.bb
+++ b/meta-phosphor/recipes-phosphor/smbios/smbios-mdr_git.bb
@@ -15,6 +15,7 @@
 PACKAGECONFIG[smbios-no-dimm] = "-Ddimm-dbus=disabled,-Ddimm-dbus=enabled"
 PACKAGECONFIG[cpuinfo] = "-Dcpuinfo=enabled,-Dcpuinfo=disabled,libpeci i2c-tools"
 PACKAGECONFIG[smbios-ipmi-blob] = "-Dsmbios-ipmi-blob=enabled,-Dsmbios-ipmi-blob=disabled,phosphor-ipmi-blobs"
+PACKAGECONFIG[assoc-trim-path] = "-Dassoc-trim-path=enabled,-Dassoc-trim-path=disabled"
 PV = "1.0+git${SRCPV}"
 PR = "r1"