x86, cpu: Kill cpu_has_mp

It was used only for checking for some K7s which didn't have MP support,
see

http://www.hardwaresecrets.com/article/How-to-Transform-an-Athlon-XP-into-an-Athlon-MP/24

and it was unconditionally set on 64-bit for no reason. Kill it.
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: http://lkml.kernel.org/r/1403609105-8332-4-git-send-email-bp@alien8.deSigned-off-by: H. Peter Anvin <hpa@zytor.com>

arch/x86/include/asm/cpufeature.h

@@ -315,7 +315,6 @@ extern const char * const x86_bug_flags[NBUGINTS*32];
 #define cpu_has_avx		boot_cpu_has(X86_FEATURE_AVX)
 #define cpu_has_avx2		boot_cpu_has(X86_FEATURE_AVX2)
 #define cpu_has_ht		boot_cpu_has(X86_FEATURE_HT)
-#define cpu_has_mp		boot_cpu_has(X86_FEATURE_MP)
 #define cpu_has_nx		boot_cpu_has(X86_FEATURE_NX)
 #define cpu_has_k6_mtrr		boot_cpu_has(X86_FEATURE_K6_MTRR)
 #define cpu_has_cyrix_arr	boot_cpu_has(X86_FEATURE_CYRIX_ARR)
@@ -362,9 +361,6 @@ extern const char * const x86_bug_flags[NBUGINTS*32];
 #undef  cpu_has_pae
 #define cpu_has_pae		___BUG___
 
-#undef  cpu_has_mp
-#define cpu_has_mp		1
-
 #undef  cpu_has_k6_mtrr
 #define cpu_has_k6_mtrr		0