linux: inherit pkgconfig in kernel.bbclass

pkgconfig is being required to find dependencies for building kernel
native tools, move "inherit pkgconfig" to kernel.bbclass so BSP kernel
recipes can also benefit from it.

(From OE-Core rev: 9a1ae305719a4dc2344dbbad46caf99ca8155e98)

Signed-off-by: Ming Liu <liu.ming50@gmail.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
(cherry picked from commit 8a84bd98e3fbc16c782f83064801e469d086911e)
Signed-off-by: Steve Sakoman <steve@sakoman.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-kernel/linux/linux-yocto-dev.bb

@@ -10,8 +10,6 @@
 
 inherit kernel
 require recipes-kernel/linux/linux-yocto.inc
-# for ncurses tests
-inherit pkgconfig
 
 # provide this .inc to set specific revisions
 include recipes-kernel/linux/linux-yocto-dev-revisions.inc

meta/recipes-kernel/linux/linux-yocto.inc

@@ -47,7 +47,6 @@ LINUX_VERSION_EXTENSION ??= "-yocto-${LINUX_KERNEL_TYPE}"
 # Pick up shared functions
 inherit kernel
 inherit kernel-yocto
-inherit pkgconfig
 
 B = "${WORKDIR}/linux-${PACKAGE_ARCH}-${LINUX_KERNEL_TYPE}-build"