m32r: move generic-y of exported headers to uapi/asm/Kbuild

Since commit fcc8487d ("uapi: export all headers under uapi
directories"), all (and only) headers under uapi directories are
exported, but asm-generic wrappers are still exceptions.

To complete de-coupling the uapi from kernel headers, move generic-y
of exported headers to uapi/asm/Kbuild.

With this change, "make headers_install" will just need to parse
uapi/asm/Kbuild to build up exported headers.

Also, move "generic-y += kprobes.h" up in order to keep the entries
sorted.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

arch/m32r/include/asm/Kbuild

-
 generic-y += clkdev.h
 generic-y += current.h
 generic-y += exec.h
 generic-y += extable.h
 generic-y += irq_work.h
-generic-y += kvm_para.h
+generic-y += kprobes.h
 generic-y += mcs_spinlock.h
 generic-y += mm-arch-hooks.h
 generic-y += module.h
@@ -12,4 +11,3 @@ generic-y += preempt.h
 generic-y += sections.h
 generic-y += trace_clock.h
 generic-y += word-at-a-time.h
-generic-y += kprobes.h

arch/m32r/include/uapi/asm/Kbuild

 # UAPI Header export list
 include include/uapi/asm-generic/Kbuild.asm
 
+generic-y += kvm_para.h
 generic-y += siginfo.h