meta-ampere: Cleanup for Yocto override syntax change

Run convert-overrides.py meta-ampere and update missing changes as
below:
- Change all _mtjade to :mtjade
- Change all _${PN} to :${PN}

Tested:
1. Check compilation without problem.
2. Check basic functions like switch UART mux, power control.

Signed-off-by: Thang Q. Nguyen <thang@os.amperecomputing.com>
Change-Id: I42038b2a98ed1951d6c770bdf49f5fc440f8163e
diff --git a/meta-ampere/meta-common/recipes-phosphor/interfaces/bmcweb_%.bbappend b/meta-ampere/meta-common/recipes-phosphor/interfaces/bmcweb_%.bbappend
index 15fb5e6..584ce60 100644
--- a/meta-ampere/meta-common/recipes-phosphor/interfaces/bmcweb_%.bbappend
+++ b/meta-ampere/meta-common/recipes-phosphor/interfaces/bmcweb_%.bbappend
@@ -1,6 +1,6 @@
-FILESEXTRAPATHS_append := "${THISDIR}/${PN}:"
+FILESEXTRAPATHS:append := "${THISDIR}/${PN}:"
 
-EXTRA_OEMESON_append = " \
+EXTRA_OEMESON:append = " \
      -Dinsecure-tftp-update=enabled \
      -Dbmcweb-logging=enabled \
      -Dredfish-bmc-journal=enabled \