x86/fpu: Rename fpu/xsave.c to fpu/xstate.c

Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>

arch/x86/kernel/fpu/Makefile

@@ -2,4 +2,4 @@
 # Build rules for the FPU support code:
 #
 
-obj-y				+= init.o bugs.o core.o xsave.o
+obj-y				+= init.o bugs.o core.o xstate.o