get rid of generic instances of asm/exec.h

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/arch/sparc/include/asm/Kbuild b/arch/sparc/include/asm/Kbuild
index 67f83e0..cf1e857 100644
--- a/arch/sparc/include/asm/Kbuild
+++ b/arch/sparc/include/asm/Kbuild
@@ -18,6 +18,7 @@
 header-y += watchdog.h
 
 generic-y += div64.h
+generic-y += exec.h
 generic-y += local64.h
 generic-y += irq_regs.h
 generic-y += local.h