x86/fpu: Fixup uninitialized feature_name warning

x86/fpu: Fixup uninitialized feature_name warning

Hand in &feature_name to cpu_has_xfeatures() as it is supposed
to. Fixes an uninitialized warning.

Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: brgerst@gmail.com
Cc: dvlasenk@redhat.com
Cc: fenghua.yu@intel.com
Cc: luto@amacapital.net
Cc: tim.c.chen@linux.intel.com
Fixes: d91cab78133d ("x86/fpu: Rename XSAVE macros")
Link: http://lkml.kernel.org/r/20150923104901.GA3538@pd.tnic
Signed-off-by: Ingo Molnar <mingo@kernel.org>