parisc: move core-y in arch/parisc/Makefile to arch/parisc/Kbuild

Use obj-y to clean up Makefile.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Helge Deller <deller@gmx.de>
diff --git a/arch/parisc/Kbuild b/arch/parisc/Kbuild
index a4e40e5..3c068b7 100644
--- a/arch/parisc/Kbuild
+++ b/arch/parisc/Kbuild
@@ -1 +1,2 @@
 # SPDX-License-Identifier: GPL-2.0-only
+obj-y	+= mm/ kernel/ math-emu/