rpi-basic-image: Refactor to avoid double deprecation warnings
If rpi-basic-image is based on rpi-hwup-image, both deprecation warnings are
printed which may be confusing. Therefore let's just copy over the relevant bits
of rpi-hwup-image for now.
-# Base this image on rpi-hwup-image
-include rpi-hwup-image.bb
+# Base this image on core-image-minimal
+include recipes-core/images/core-image-minimal.bb
+
+# Include modules in rootfs
+IMAGE_INSTALL += " \
+ kernel-modules \
+ "
SPLASH = "psplash-raspberrypi"
