linux/scc.h: make uapi linux/scc.h self-contained

Userspace cannot compile <linux/scc.h>

CC usr/include/linux/scc.h.s
In file included from <command-line>:32:0:
usr/include/linux/scc.h:20:20: error: `SIOCDEVPRIVATE' undeclared here (not in a function)
SIOCSCCRESERVED = SIOCDEVPRIVATE,
^~~~~~~~~~~~~~

Include <linux/sockios.h> to make it self-contained, and add it to the
compile-test coverage.

Link: http://lkml.kernel.org/r/[e-mail]
Signed-off-by: Masahiro Yamada <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

include/uapi/linux/scc.h

···
 #ifndef _UAPI_SCC_H
 #define _UAPI_SCC_H
 
+#include <linux/sockios.h>
 
 /* selection of hardware types */
 

usr/include/Makefile

···
 header-test- += linux/patchkey.h
 header-test- += linux/phonet.h
 header-test- += linux/reiserfs_xattr.h
-header-test- += linux/scc.h
 header-test- += linux/sctp.h
 header-test- += linux/signal.h
 header-test- += linux/sysctl.h