termios: Consolidate termios c_cc symbolic constants

This patch consolidates the termios symbolic constants used as subscript
for the array c_cc on its own header.  The Linux generic implementation
values match the kernel UAPI and each architecture with deviate values
have their own implementation (in this case alpha, mips64, sparc64, and
powerpc).

No semantic change is expected, checked on a build against x86_64-linux-gnu,
alpha-linux-gnu, mips64-linux-gnu, and sparc64-linux-gnu.

	* sysdeps/unix/sysv/linux/Makefile (sysdeps_headers): Add
	termios-cc.h.
	* sysdeps/unix/sysv/linux/bits/termios-c_cc.h: Likewise.
	* sysdeps/unix/sysv/linux/alpha/bits/termios-c_cc.h: New file.
	* sysdeps/unix/sysv/linux/mips/bits/termios-c_cc.h: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/bits/termios-c_cc.h: Likewise.
	* sysdeps/unix/sysv/linux/sparc/bits/termios-c_cc.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/termios.h (VINTR, VQUIT, VERASE,
	VKILL, VEOF, VTIME, VMIN, VSWTC, VSTART, VSTOP, VSUSP, VEOL,
	VREPRINT, VDISCARD, VWERASE, VLNEXT, VEOLF2): Move to termios-cc.h.
	* sysdeps/unix/sysv/linux/alpha/bits/termios.h: Likewise.
	* sysdeps/unix/sysv/linux/mips/bits/termios.h: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/bits/termios.h: Likewise.
	* sysdeps/unix/sysv/linux/sparc/bits/termios.h: Likewise.

2 files changed, 42 insertions, 20 deletions

diff --git a/sysdeps/unix/sysv/linux/powerpc/bits/termios-c_cc.h b/sysdeps/unix/sysv/linux/powerpc/bits/termios-c_cc.h
new file mode 100644
index 0000000..2dbb757
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/powerpc/bits/termios-c_cc.h
@@ -0,0 +1,41 @@
+/* termios c_cc symbolic constant definitions.  Linux/powerpc version.
+   Copyright (C) 2019 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library.  If not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef _TERMIOS_H
+# error "Never include <bits/termios-c_cc.h> directly; use <termios.h> instead."
+#endif
+
+/* c_cc characters */
+#define VINTR	0
+#define VQUIT	1
+#define VERASE	2
+#define VKILL	3
+#define VEOF	4
+#define VMIN	5
+#define VEOL	6
+#define VTIME	7
+#define VEOL2	8
+#define VSWTC	9
+
+#define VWERASE	10
+#define VREPRINT	11
+#define VSUSP		12
+#define VSTART		13
+#define VSTOP		14
+#define VLNEXT		15
+#define VDISCARD	16
diff --git a/sysdeps/unix/sysv/linux/powerpc/bits/termios.h b/sysdeps/unix/sysv/linux/powerpc/bits/termios.h
index 4dafb60..5a0bce6 100644
--- a/sysdeps/unix/sysv/linux/powerpc/bits/termios.h
+++ b/sysdeps/unix/sysv/linux/powerpc/bits/termios.h
@@ -24,26 +24,7 @@ typedef unsigned int	speed_t;
 typedef unsigned int	tcflag_t;
 
 #include <bits/termios-struct.h>
-
-/* c_cc characters */
-#define VINTR	0
-#define VQUIT	1
-#define VERASE	2
-#define VKILL	3
-#define VEOF	4
-#define VMIN	5
-#define VEOL	6
-#define VTIME	7
-#define VEOL2	8
-#define VSWTC	9
-
-#define VWERASE	10
-#define VREPRINT	11
-#define VSUSP		12
-#define VSTART		13
-#define VSTOP		14
-#define VLNEXT		15
-#define VDISCARD	16
+#include <bits/termios-c_cc.h>
 
 /* c_iflag bits */
 #define IGNBRK	0000001