lmsensors: support package lmsensors

Recipe lmsensors has multiple packages, but do not provide package lmsensors.
The fix will allow package lmsensors empty, and it runtime depends on other
sub packages. It is convenience for Yocto new user to install all of them
by specifying one package, especially the package name is the same with
recipe name

Signed-off-by: Hongxu Jia <hongxu.jia@windriver.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-oe/recipes-bsp/lm_sensors/lmsensors_3.5.0.bb

@@ -70,6 +70,18 @@ do_install() {
 
 RPROVIDES_${PN}-dbg += "${PN}-libsensors-dbg ${PN}-sensors-dbg ${PN}-sensord-dbg ${PN}-isatools-dbg"
 
+ALLOW_EMPTY_${PN} = "1"
+RDEPENDS_${PN} += " \
+    ${PN}-libsensors \
+    ${PN}-sensors \
+    ${PN}-sensord \
+    ${PN}-fancontrol \
+    ${PN}-sensorsdetect \
+    ${PN}-sensorsconfconvert \
+    ${PN}-pwmconfig \
+    ${PN}-isatools \
+"
+
 # libsensors packages
 PACKAGES =+ "${PN}-libsensors ${PN}-libsensors-dev ${PN}-libsensors-staticdev ${PN}-libsensors-doc"