x86, xsave: Add forgotten inline annotation

Add a missing inline annotation on a static function, in order to shut
up a bunch of warnings like:

In file included from arch/x86/crypto/camellia_aesni_avx_glue.c:23:0:
./arch/x86/include/asm/xsave.h:73:12: warning: ‘xsave_state_booting’ defined but not used [-Wunused-function]
 static int xsave_state_booting(struct xsave_struct *fx, u64 mask)
            ^
In file included from arch/x86/crypto/camellia_aesni_avx2_glue.c:23:0:
./arch/x86/include/asm/xsave.h:73:12: warning: ‘xsave_state_booting’ defined but not used [-Wunused-function]
 static int xsave_state_booting(struct xsave_struct *fx, u64 mask)
            ^
...

Cc: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: NBorislav Petkov <bp@suse.de>
Link: http://lkml.kernel.org/r/1403000468-30094-1-git-send-email-bp@alien8.deSigned-off-by: NH. Peter Anvin <hpa@linux.intel.com>

arch/x86/include/asm/xsave.h

@@ -70,7 +70,7 @@ extern int init_fpu(struct task_struct *child);
  * This function is called only during boot time when x86 caps are not set
  * up and alternative can not be used yet.
  */
-static int xsave_state_booting(struct xsave_struct *fx, u64 mask)
+static inline int xsave_state_booting(struct xsave_struct *fx, u64 mask)
 {
 	u32 lmask = mask;
 	u32 hmask = mask >> 32;