Disintegrate asm/system.h for OpenRISC

Disintegrate asm/system.h for OpenRISC.  Not compiled.

Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
cc: linux@lists.openrisc.net
diff --git a/arch/openrisc/include/asm/Kbuild b/arch/openrisc/include/asm/Kbuild
index 11162e6..dcea5a0 100644
--- a/arch/openrisc/include/asm/Kbuild
+++ b/arch/openrisc/include/asm/Kbuild
@@ -4,6 +4,7 @@
 
 generic-y += atomic.h
 generic-y += auxvec.h
+generic-y += barrier.h
 generic-y += bitsperlong.h
 generic-y += bug.h
 generic-y += bugs.h
@@ -19,6 +20,7 @@
 generic-y += dma.h
 generic-y += emergency-restart.h
 generic-y += errno.h
+generic-y += exec.h
 generic-y += fb.h
 generic-y += fcntl.h
 generic-y += ftrace.h
@@ -55,6 +57,7 @@
 generic-y += statfs.h
 generic-y += stat.h
 generic-y += string.h
+generic-y += switch_to.h
 generic-y += swab.h
 generic-y += termbits.h
 generic-y += termios.h