x86/fpu: Simplify fpu__cpu_init()

After the latest round of cleanups, fpu__cpu_init() has become
a simple call to fpu__init_cpu().

Rename fpu__init_cpu() to fpu__cpu_init() and remove the
extra layer.

Reviewed-by: Borislav Petkov <bp@alien8.de>
Cc: Andy Lutomirski <luto@amacapital.net>
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>
diff --git a/arch/x86/include/asm/fpu/internal.h b/arch/x86/include/asm/fpu/internal.h
index 71d44be..4617eeb 100644
--- a/arch/x86/include/asm/fpu/internal.h
+++ b/arch/x86/include/asm/fpu/internal.h
@@ -36,7 +36,7 @@
 #define	MXCSR_DEFAULT		0x1f80
 
 extern unsigned int mxcsr_feature_mask;
-extern void fpu__cpu_init(void);
+extern void fpu__init_cpu(void);
 extern void eager_fpu_init(void);
 
 extern void fpu__init_system_xstate(void);