x86/fpu: Harmonize the names of the fpstate_init() helper functions

Harmonize the inconsistent naming of these related functions:

                          fpstate_init()
  finit_soft_fpu()   =>   fpstate_init_fsoft()
  fx_finit()         =>   fpstate_init_fxstate()
  fx_finit()         =>   fpstate_init_fstate()       # split out

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>
diff --git a/arch/x86/include/asm/fpu/internal.h b/arch/x86/include/asm/fpu/internal.h
index dfdafea..0236ae6 100644
--- a/arch/x86/include/asm/fpu/internal.h
+++ b/arch/x86/include/asm/fpu/internal.h
@@ -28,7 +28,18 @@
 extern void fpu__init_system(struct cpuinfo_x86 *c);
 
 extern void fpu__activate_curr(struct fpu *fpu);
+
 extern void fpstate_init(struct fpu *fpu);
+#ifdef CONFIG_MATH_EMULATION
+extern void fpstate_init_soft(struct i387_soft_struct *soft);
+#else
+static inline void fpstate_init_soft(struct i387_soft_struct *soft) {}
+#endif
+static inline void fpstate_init_fxstate(struct i387_fxsave_struct *fx)
+{
+	fx->cwd = 0x37f;
+	fx->mxcsr = MXCSR_DEFAULT;
+}
 
 extern int  dump_fpu(struct pt_regs *, struct user_i387_struct *);
 extern int  fpu__exception_code(struct fpu *fpu, int trap_nr);
@@ -48,12 +59,6 @@
 
 DECLARE_PER_CPU(struct fpu *, fpu_fpregs_owner_ctx);
 
-#ifdef CONFIG_MATH_EMULATION
-extern void finit_soft_fpu(struct i387_soft_struct *soft);
-#else
-static inline void finit_soft_fpu(struct i387_soft_struct *soft) {}
-#endif
-
 /*
  * Must be run with preemption disabled: this clears the fpu_fpregs_owner_ctx,
  * on this CPU.
@@ -93,12 +98,6 @@
 	return static_cpu_has_safe(X86_FEATURE_FXSR);
 }
 
-static inline void fx_finit(struct i387_fxsave_struct *fx)
-{
-	fx->cwd = 0x37f;
-	fx->mxcsr = MXCSR_DEFAULT;
-}
-
 extern void fpstate_sanitize_xstate(struct fpu *fpu);
 
 #define user_insn(insn, output, input...)				\