meta-ampere: ipmi-oem: add missing pkgconfig dependency

Add inherit contrain pkgconfig on the ampere-ipmi-oem application so
that it can be compiled successfully.

Tested:
1. Compile Mt.Jade OpenBMC without error.

Signed-off-by: Thang Q. Nguyen <thang@os.amperecomputing.com>
Change-Id: I62c93fbd6f9789e03a961d03c2801e04237b302b
diff --git a/meta-ampere/meta-common/recipes-phosphor/ipmi/ampere-ipmi-oem.bb b/meta-ampere/meta-common/recipes-phosphor/ipmi/ampere-ipmi-oem.bb
index 58579a1..3f84350 100644
--- a/meta-ampere/meta-common/recipes-phosphor/ipmi/ampere-ipmi-oem.bb
+++ b/meta-ampere/meta-common/recipes-phosphor/ipmi/ampere-ipmi-oem.bb
@@ -8,7 +8,7 @@
 
 DEPENDS = "boost phosphor-ipmi-host phosphor-logging systemd libgpiod"
 
-inherit cmake obmc-phosphor-ipmiprovider-symlink
+inherit cmake pkgconfig obmc-phosphor-ipmiprovider-symlink
 
 EXTRA_OECMAKE="-DENABLE_TEST=0 -DYOCTO=1"