meta-ibm: romulus: fans: switch to non-native

meta-phosphor recently enabled target class config recipes.  Those are
preferable to native class config recipes because native recipes cannot
be overridden based on MACHINE, so switch to target class config
recipes.

Switching to target class recipes consists of temporarily setting
PHOSPHOR_FAN_CONFIG_USE_NATIVE_SYSROOT to 0, overriding the phosphor
distro default of 1.  After all OpenBMC BSP layers have moved to target
class config recipes PHOSPHOR_FAN_CONFIG_USE_NATIVE_SYSROOT can be
removed from meta-phosphor and any BSP layers.

Any references to -native recipes are replaced with their target class
counterparts.

Any -native bbappends are re-worked to apply to their target class
counterparts.

Finally, use BPN instead of PN when setting FILESEXTRAPATHS, to avoid
unfortunate directory hierarchies if these bbappends are copy/pasted and
then used to bbappend a native recipe.  Since this patch moves to target
class recipes, this is a noop; however, this avoids unfortunate
directory hierarchies with native bbappends such as:

meta-base/recipes-foo/bar/baz-native.bb
meta-base/recipes-foo/bar/baz/a-file

meta-append/recipes-foo/bar/baz-native.bbappend
meta-append/recipes-foo/bar/baz-native/b-file

Using "${THISDIR}/${BPN}:" enables a more sensible hierarchy:

meta-base/recipes-foo/bar/baz-native.bb
meta-base/recipes-foo/bar/baz/a-file

meta-append/recipes-foo/bar/baz-native.bbappend
meta-append/recipes-foo/bar/baz/b-file

This behavior occurs because By default FILESPATH is set in base.bbclass
(in OE-Core) to look for files in ${BP}, ${BPN} and files (and a number
of subdirectories of those based on ${FILESOVERRIDES}).

(From meta-ibm rev: 589ee00a5ec7bc97c7d5c079cf66b3dbd3ac2b4f)

Change-Id: I1a593373f1b4bc82c554a9330cdd75f04f21d1d8
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/meta-ibm/meta-romulus/recipes-phosphor/fans/phosphor-fan-control-events-config.bbappend b/meta-ibm/meta-romulus/recipes-phosphor/fans/phosphor-fan-control-events-config.bbappend
new file mode 100644
index 0000000..781af4f
--- /dev/null
+++ b/meta-ibm/meta-romulus/recipes-phosphor/fans/phosphor-fan-control-events-config.bbappend
@@ -0,0 +1 @@
+FILESEXTRAPATHS_prepend_romulus := "${THISDIR}/${BPN}:"