meta-yadro: impi: Rename phosphor-ipmi-config

phosphor-ipmi-config is the package without an external repository and
does not have any suffixes in the name.

This just renames the bbappend file and fixes the build.

Change-Id: I36a33247a6a4210c1f7c0bde0bf5aa773e6d0108
Signed-off-by: Alexander Filippov <a.filippov@yadro.com>
diff --git a/recipes-phosphor/ipmi/phosphor-ipmi-config_%.bbappend b/recipes-phosphor/ipmi/phosphor-ipmi-config.bbappend
similarity index 100%
rename from recipes-phosphor/ipmi/phosphor-ipmi-config_%.bbappend
rename to recipes-phosphor/ipmi/phosphor-ipmi-config.bbappend